Mr. Chief Justice PARKER
delivered the opinion of the court.
Plaintiff, Richard Bumbaca, sued defendants, Shipton Supply Co., Inc., and William Cooper and Nephews, Inc., alleging that the Cooper firm manufactured a fly-killing product known as Del-Tox and sold and distributed such product to Shipton Supply Co., which on June 20,
1970,
sold him a half-gallon of the product for valuable consideration; that the next day plaintiff mixed the Del-Tox with water, sprayed his cattle, and later that day found certain of them sick and others dying from organic phosphate poisoning caused by the spraying; that he lost ten steers (value, $2,430), the remaining steers lost weight, and he incurred certain veterinarian expense and labor, all to his damage in the sum of $6,422. The complaint was in two causes, one for negligence “in that they [defendants] did not exercise care in:
“a) That they did not properly instruct the user of their products in the use of an inherently dangerous substance.
“b) That the use of the product of Defendants was toxic to cattle.
“c) That Defendants manufactured, sold, and distributed a dangerous substance not fit for the purpose and use for which sold.”
Plaintiff included a second claim alleging implied and express warranties.
The defendants filed separate answers, denying generally; and Shipton Supply Co. cross-claimed, demanding judgment against .Cooper for the amount of any damages that might be adjudged against it in plaintiff’s favor.
The case was tried to the court sitting without a jury, resulting in a judgment for plaintiff in the sum of $5,100, from which defendants have appealed, urging that four circumstances require reversal of the judgment:
1. Plaintiff did not follow the directions on the label of Del-Tox.
2. Plaintiff failed to prove a defective product.
3. Plaintiff failed to show his injury was proximately caused by defendants.
4. Testimony of plaintiff’s experts about the properties of Del-Tox was self-refuting.
The relevant facts are uncomplicated and undisputed. On June 20, 1970, plaintiff bought a half-gallon of Del-Tox from the Shipton company. That product, containing dioxathion, an organophosphorus compound, could be given up to a threshold or toxic level with no adverse effects.
Around 4 or 5 a. m., June 21, plaintiff cor-raled eighty-four steers and between 7 and 7:30 a. m. he twice poured half of the Del-Tox in a fifty-gallon barrel, which had the top cut out, and sprayed the cattle from that, placing an electric pump in the barrel and spraying through a hose equipped with a garden nozzle as the cattle circled about him. He did not stir or mix the Del-Tox other than by water pressure. Plaintiff, anticipating that a cattle buyer would be coming to see his cattle, did not release the animals but opened a gate so that they had access to another corral— neither corral had drinking water for the cattle. It was a fairly warm day, plaintiff indicating that the temperature had probably reached seventy or eighty degrees. Returning about 5 p. m., plaintiff found one animal dead and others wobbly and dropping. He called a veterinarian, who after ascertaining the animals had been sprayed with Del-Tox came out. On clinical examination of the animals his diagnosis was organic phosphate poisoning, and he treated several with atropine.
The doctor said the cattle treated were ataxic, dyspneic, and cyanotic from anoxia. Six of the steers died during that evening and four others later.
According' to the testimony adduced by plaintiff, some fifty of the remaining animals lost weight and suffered ill effects. The veterinarian who treated the steers conceded that he had performed no autopsies but said that an autopsy or blood testing for organic phosphate toxicity is not conclusive and that the symptoms of the steers were “pretty much what you see with organic phosphate toxicity alone.” Another veterinarian subsequently saw the animals, including those that were dead, but performed no autopsies. His diagnosis, after being informed that they had been sprayed with Del-Tox, was toxemia from Del-Tox spray.
Records of the Cooper company indicated no other cattle losses from use of this particular batch of Del-Tox (generally the batch size ran from 3,700 to 4,500 gallons).
The trial court made the following findings of fact and conclusions of law:
“FINDINGS OF FACT “1.
“That on or about June 20, 1970, the Plaintiff purchased from Defendant, Shipton Supply Co., Inc., a half gallon bottle of Del Tox, a product manufactured by William Cooper and Nephews, Inc., and sold for, among other purposes, control of flies on cattle. That said Del Tox consists of organic phosphate chemicals which are toxic and are inherently dangerous to livestock.
“2.
“That on June 22, 1970, the Plaintiff mixed the Del Tox with water in accordance with the directions contained on the bottle’s label, and thereafter proceeded to spray approximately 84 steers owned by him.
“3.
“That within a short time after spraying the steers, a number of the cattle became ill and Plaintiff contacted a veterinarian, Dr. Ray Smith, who diagnosed the illness as caused by organic phosphate poisoning, the source of such organic phosphate being the contents of the Del Tox.
“4.
“Ten large steers died of organic phosphate poisoning and about fifty head of other steers became ill from the poisoning. Atrophine [sic], the antidotal prescribed by the Del Tox label, was used in the treatment of the cattle by Dr. Smith and the Plaintiff.
“5.
“That the label of Del Tox purchased by Plaintiff contained no instructions as to the quantity of Del Tox to be applied to cattle.
“6.
“That the market value of the ten steers lost was $2,430. That the remaining cattle afflicted with organic phosphate poisoning were ill for a period of time and did not have the normal and customary gain of similar steers to the Plaintiff’s damage in the amount of $2,000. That in the care of such stock the Plaintiff incurred $105 in Veterinarian fees and costs of medicine. That Plaintiff also expended additional labor and care in attending the sick animals, the reasonable value of which labor was $565.00.
“7.
“That Defendant, Shipton Supply Co., Inc., purchased the bottle of Del Tox in the regular channels of commerce from Defendant, William Cooper and Nephews, Inc. and resold the Del Tox in the same container and condition as when received by it.
“CONCLUSIONS OF LAW
“1.
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Mr. Chief Justice PARKER
delivered the opinion of the court.
Plaintiff, Richard Bumbaca, sued defendants, Shipton Supply Co., Inc., and William Cooper and Nephews, Inc., alleging that the Cooper firm manufactured a fly-killing product known as Del-Tox and sold and distributed such product to Shipton Supply Co., which on June 20,
1970,
sold him a half-gallon of the product for valuable consideration; that the next day plaintiff mixed the Del-Tox with water, sprayed his cattle, and later that day found certain of them sick and others dying from organic phosphate poisoning caused by the spraying; that he lost ten steers (value, $2,430), the remaining steers lost weight, and he incurred certain veterinarian expense and labor, all to his damage in the sum of $6,422. The complaint was in two causes, one for negligence “in that they [defendants] did not exercise care in:
“a) That they did not properly instruct the user of their products in the use of an inherently dangerous substance.
“b) That the use of the product of Defendants was toxic to cattle.
“c) That Defendants manufactured, sold, and distributed a dangerous substance not fit for the purpose and use for which sold.”
Plaintiff included a second claim alleging implied and express warranties.
The defendants filed separate answers, denying generally; and Shipton Supply Co. cross-claimed, demanding judgment against .Cooper for the amount of any damages that might be adjudged against it in plaintiff’s favor.
The case was tried to the court sitting without a jury, resulting in a judgment for plaintiff in the sum of $5,100, from which defendants have appealed, urging that four circumstances require reversal of the judgment:
1. Plaintiff did not follow the directions on the label of Del-Tox.
2. Plaintiff failed to prove a defective product.
3. Plaintiff failed to show his injury was proximately caused by defendants.
4. Testimony of plaintiff’s experts about the properties of Del-Tox was self-refuting.
The relevant facts are uncomplicated and undisputed. On June 20, 1970, plaintiff bought a half-gallon of Del-Tox from the Shipton company. That product, containing dioxathion, an organophosphorus compound, could be given up to a threshold or toxic level with no adverse effects.
Around 4 or 5 a. m., June 21, plaintiff cor-raled eighty-four steers and between 7 and 7:30 a. m. he twice poured half of the Del-Tox in a fifty-gallon barrel, which had the top cut out, and sprayed the cattle from that, placing an electric pump in the barrel and spraying through a hose equipped with a garden nozzle as the cattle circled about him. He did not stir or mix the Del-Tox other than by water pressure. Plaintiff, anticipating that a cattle buyer would be coming to see his cattle, did not release the animals but opened a gate so that they had access to another corral— neither corral had drinking water for the cattle. It was a fairly warm day, plaintiff indicating that the temperature had probably reached seventy or eighty degrees. Returning about 5 p. m., plaintiff found one animal dead and others wobbly and dropping. He called a veterinarian, who after ascertaining the animals had been sprayed with Del-Tox came out. On clinical examination of the animals his diagnosis was organic phosphate poisoning, and he treated several with atropine.
The doctor said the cattle treated were ataxic, dyspneic, and cyanotic from anoxia. Six of the steers died during that evening and four others later.
According' to the testimony adduced by plaintiff, some fifty of the remaining animals lost weight and suffered ill effects. The veterinarian who treated the steers conceded that he had performed no autopsies but said that an autopsy or blood testing for organic phosphate toxicity is not conclusive and that the symptoms of the steers were “pretty much what you see with organic phosphate toxicity alone.” Another veterinarian subsequently saw the animals, including those that were dead, but performed no autopsies. His diagnosis, after being informed that they had been sprayed with Del-Tox, was toxemia from Del-Tox spray.
Records of the Cooper company indicated no other cattle losses from use of this particular batch of Del-Tox (generally the batch size ran from 3,700 to 4,500 gallons).
The trial court made the following findings of fact and conclusions of law:
“FINDINGS OF FACT “1.
“That on or about June 20, 1970, the Plaintiff purchased from Defendant, Shipton Supply Co., Inc., a half gallon bottle of Del Tox, a product manufactured by William Cooper and Nephews, Inc., and sold for, among other purposes, control of flies on cattle. That said Del Tox consists of organic phosphate chemicals which are toxic and are inherently dangerous to livestock.
“2.
“That on June 22, 1970, the Plaintiff mixed the Del Tox with water in accordance with the directions contained on the bottle’s label, and thereafter proceeded to spray approximately 84 steers owned by him.
“3.
“That within a short time after spraying the steers, a number of the cattle became ill and Plaintiff contacted a veterinarian, Dr. Ray Smith, who diagnosed the illness as caused by organic phosphate poisoning, the source of such organic phosphate being the contents of the Del Tox.
“4.
“Ten large steers died of organic phosphate poisoning and about fifty head of other steers became ill from the poisoning. Atrophine [sic], the antidotal prescribed by the Del Tox label, was used in the treatment of the cattle by Dr. Smith and the Plaintiff.
“5.
“That the label of Del Tox purchased by Plaintiff contained no instructions as to the quantity of Del Tox to be applied to cattle.
“6.
“That the market value of the ten steers lost was $2,430. That the remaining cattle afflicted with organic phosphate poisoning were ill for a period of time and did not have the normal and customary gain of similar steers to the Plaintiff’s damage in the amount of $2,000. That in the care of such stock the Plaintiff incurred $105 in Veterinarian fees and costs of medicine. That Plaintiff also expended additional labor and care in attending the sick animals, the reasonable value of which labor was $565.00.
“7.
“That Defendant, Shipton Supply Co., Inc., purchased the bottle of Del Tox in the regular channels of commerce from Defendant, William Cooper and Nephews, Inc. and resold the Del Tox in the same container and condition as when received by it.
“CONCLUSIONS OF LAW
“1.
“That the Plaintiff purchased the Del Tox from Shipton Supply Co., Inc. and mixed the same in accordance with the directions on the label and properly sprayed [iis steers and was damaged in the loss and injury of his cattle by organic phosphate poisoning, the source of which was the contents of the Del Tox bottle in the total amount of $5,100.00, and that he should have Judgment for such amount from the Defendants.
“2.
“That the Defendants were negligent in the manufacture, labelling and instruction to users, and sale to users of a toxic organic phosphate chemical compound.
“3.
“That the Defendants breached their warranty to Plaintiff that the Del Tox manufactured and sold to him was fit for the purpose and use for which sold, namely spraying of cattle.
“4.
“That Defendant, William C. Cooper and Nephews, Inc., should indemnify Defendant, Shipton Supply Co., Inc., against any loss or claim arising out of Plaintiff’s action.”
At pretrial, it was the plaintiff’s contention that the Del-Tox when mixed as directed on the bottle caused organic phosphate poisoning, resulting in the death and injury to his cattle, and that the sole issue of fact in the case was whether or not the cattle had suffered organic phosphate
poisoning. The trial court in its pretrial order stated, “It appears that the only issue here is one of fact to determine whether or not the Del-Tox caused the injuries complained of, and the amount of damages that the Plaintiff suffered, in event that he did.”
These pretrial statements have caused this court considerable anxiety. We would have no hesitancy, were they to be accepted, in agreeing that plaintiff satisfactorily established that his cattle suffered organic phosphate poisoning and that the Del-Tox caused the injuries of which plaintiff complained. Viewing the evidence in the light most favorable to plaintiff, we can also accept the court’s finding that the plaintiff mixed the Del-Tox in accordance with the directions contained on the label. Nevertheless, these matters standing alone would not establish a defective product nor injury proximately caused by defendants; and the contention of defcndant-Cooper, adopted by incorporation in the pretrial order, recited that the burden was on plaintiff of proving the existence of a defect in the product.
Testimony was introduced by the Ship-ton company that the Cooper firm in connection with the United States Government had developed figures with regard to how much of the Del-Tox solution should be applied per animal, that “not more than two quarts per animal reside on the animal when it is sprayed,” and that consequently two quarts of solution would be required to spray an animal. Possibly, this evidence was the basis for the court’s finding (5) that the “label of Del Tox” purchased by plaintiff contained no instructions as to the quantity of Del-Tox to be applied to cattle, and its consequent conclusion (2) that the defendants were negligent in la-belling. If so, we do not consider the conclusion to have been supported since there was no evidence that spraying an animal with more than two quarts of solution would be detrimental to it.
Plaintiff insists that under factual situations similar to those here courts have ruled the doctrine of res ipsa loquitur applicable and argues it applies in the present case because (1) the poisoning of the cattle would not ordinarily occur in the absence of negligence, (2) the product was received by Bumbaca in a sealed container so it was under the exclusive control of the defendant, (3) the Del-Tox was administered according to the directions on the label, and (4) since this particular bottle of Del-Tox was completely used, the plaintiff had no opportunity to prove it defective. Even were we to assume, arguendo, that the res ipsa doctrine could be applicable, we question plaintiff’s third enumeration, that the Del-Tox was administered according to the directions on the label. Perhaps this is merely another way of saying, as the court found, that the Del-Tox was
mixed
in accordance with the directions, but this alone does not establish a defective product nor injury proximately caused by defendants.
Although absent scientific analysis of the defect the defectiveness of a product may be proved by circumstantial evidence, such evidence in this case was insufficient. Circumstantial evidence must exclude other reasonable hypotheses with a fair amount of certainty. Weber v. Fidelity & Casualty Insurance Company of New York, 259 La. 599, 250 So.2d 754, 757;
Ross v. Great Northern Railway Company, 9 Cir., 315 F.2d 51, 58 (certiorari denied 375 U.S. 823, 84 S.Ct. 64, 11 L. Ed.2d 57); see Colorado Serum Company v. Arp, Wyo., 504 P.2d 801, 806; Prosser, Torts, p. 241 (4 ed.). Here the Cooper firm specifically and clearly instructed that animals not drink from run-off pools (see the third paragraph of “Directions” in the Appendix). This aspect was ignored by plaintiff in the presentation of his evidence at the trial level and bypassed in the ap
peal by the mere statement that “No evidence exists as to any ‘pools’ or ‘puddles’ of the mixture from which the cattle could drink.” The burden was on plaintiff, and his failure to meet it was crucial. Accordingly, we must agree with defendants’ contention that he failed to show his injury was proximately caused by defendants.
Reversed.