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Pat McKay
Animal Homeopathy

Pat McKay Animal HomeopathyPat McKay Animal HomeopathyPat McKay Animal Homeopathy

Pottenger’s Cats

A book review by Pat McKay

 Pottenger’s Cats, A Study in Nutrition Francis M Pottenger, Jr, MD
 

Francis  Pottenger, Jr, MD, has given the cat world one of the best books  available in the study of carnivore's nutrition. Between the years of  1932 and 1942, he conducted a feeding experiment to determine the  effects of heat-processed food on 900 cats. I have to admit I don't like  the reason he was doing the study, because it involved adrenalectomies  (surgical removal of the adrenal glands) for use in standardizing the  hormone content of the adrenal extract he was making. However, the study  tells so much about carnivorous cats and their need for raw food that  as long as the study has already been done, let's now make this  information useful for cats.

Most of what I have written in this  article/review is verbatim from his book. The complete 123 page book is  available from the Price-Pottenger Nutrition Foundation for $9.95.

https://www.amazon.com/Pottengers-Cats-Francis-Marion-Pottenger/dp/0916764060/ref=sr_1_1?ie=UTF8&qid=1478779828&sr=8-1&keywords=price+pottenger

The  cats in the study were kept in large outdoor pens overlooking the San  Gabriel Valley in California, so the weather was moderate for the cats.  Each pen had an open air enclosure 12 feet long, 6 feet wide, and 7 feet  high which was screened by chicken-wire so the cats had adequate  exposure to the sun. A trench 18 inches deep was dug in each enclosure  and filled with freshly washed sand. A roofed area approximately 4 feet  deep with a wooden floor and bedding extended from the back of each pen  to provide shelter for the animals during inclement weather.

All  animals were subject to the same routine procedures. Each cat had its  own clinical chart and notes were kept through his/her life. At the end  of ten years, 600 out of 900 cats studied had complete, recorded health  histories. 

General Observations Raw Meat Group

The cats fed a diet of 2/3 raw meat, 1/3 raw milk, and cod liver oil show  striking uniformity in their sizes and their skeletal developments. From  generation to generation they maintain a regular, broad face with  prominent malar (pertaining to the cheek or cheek bone) and orbital  arches, adequate nasal cavities, broad dental arches, and regular  dentition. The configuration of the female skull is different from the  male skull, and each sex maintains his/her distinct anatomical features.  The membranes are firm and of good, pink color with no evidence of  infection or degenerative change. Tissue tone is excellent, and the fur  is of good quality with very little shedding noted. In the older cats,  particularly the males, engaging in fighting, the incisors are often  missing, but inflammation and disease of the gums is seldom seen.

The  calcium and phosphorus content of their femurs remains consistent, and  their internal organs show full development and normal function. Over  their life spans, they prove resistant to infections, to fleas, and to  various other parasites, and show no signs of allergies. In general,  they are gregarious, friendly, and predictable in their behavior  patterns, and when thrown or dropped as much as six feet to test their  coordination, they always land on their feet and come back for more  play. These cats reproduce one homogeneous generation after another with  the average weight of the kittens at birth being 119 grams.  Miscarriages are rare, and the litters average five kittens with the  mother cat nursing her young without difficulty.  

General Observations Cooked Meat Group

The cats fed a diet of 2/3 cooked meat, 1/3 raw milk, and cod liver oil  reproduce a heterogeneous strain of kittens, each kitten in a litter  being different in size and skeletal pattern. When comparing the changes  in configuration found in their x-rays, there are almost as many  variations in the facial and dental structures of the second and third  generation cooked-meat fed animals as there are animals. Evidence of  deficiencies is written so plainly on their faces that with a little  training, any observer can be almost certain that a given cat has been  subjected to a deficient diet or that it comes from a line of cats that  has suffered from deficient nutrition.

The long bones of  cooked-meat cats tend to increase in length and decrease in diameter  with the hind legs commonly increasing in length over the forelegs. The  trabeculation (the internal structural mesh of the bones) becomes  coarser and shows evidence of less calcium. In the third generation,  some of the bones become as soft as rubber, and a true condition of  osteogenesis imperfecta (the inherited condition in which bones are  abnormally brittle and subject to fractures) is present.

Heart  problems; nearsightedness and farsightedness; under activity of the  thyroid or inflammation of the thyroid gland; infections of the kidney,  of the liver, of the testes, of the ovaries, and of the bladder;  arthritis and inflammation of the joints; inflammation of the nervous  system with paralysis and meningitis—all occur commonly in these  cooked-meat-fed cats. A decrease in visceral volume is evidenced by the  diminishing size of their thoracic and abdominal cavities.

Frank  infections of the bone appear regularly and often appear to be the case  of death. By the time the third deficient generation is born, the cats  are so physiologically bankrupt that none survive beyond the sixth month  of life, thereby terminating the strain.

A study of the  microscopic sections of the lungs of second and third generation  deficient cats show abnormal respiratory tissues. The lungs show  hyperemia, some edema and partial atelectasis (incomplete expansion of  lungs at birth), while the most deficient show bronchitis and  pneumonitis (localized acute inflammation of the lungs without toxemia).  In several cases, a hypothyroid condition exists with the thyroid gland  showing scanty colloid and small acini (plural of acinus—one of the  small sacs in a gland lining with secreting cells), again not observable  in raw-meat-fed cats. 

Cooked-meat-fed cats show much more  irritability. Some females are even dangerous to handle and three are  named Tiger, Cobra, and Rattlesnake because of their proclivity for  biting and scratching. The males, on the other hand, are more docile,  often to the point of being unaggressive, and their sex interest is  slack or perverted. In essence, there is evidence of a role reversal  with the female cats becoming the aggressors and the male cats becoming  passive as well as evidence of increasing abnormal activities between  the same sexes. Such sexual deviations are not observed among the  raw-food cats.

Vermin and intestinal parasites abound. Skin  lesions and allergies appear frequently and are progressively worse from  one generation to the next. Pneumonia and empyema (accumulation of pus  in a cavity of the body, especially the chest) are among the principal  causes of death in adult cats while diarrhea followed by pneumonia takes  a heavy toll on the kittens. 

At autopsy, cooked-meat-fed  females frequently present ovarian atrophy and uterine congestion, and  the males often show failure in the development of active  spermatogenesis (process of formation of spermatazoa). (Spermatazoa  (plural of Spermatazoon--male germ cells.) Abortion in pregnant females  is common, running about 25 percent in the first deficient generation to  about 70 percent in the second generation. Deliveries are generally  difficult with many females dying in labor. The mortality rate of the  kittens also is high as the kittens are either born dead or are born too  frail to nurse. Following delivery, a few mother cats steadily decline  in health only to die from some obscure physiological exhaustion in  about three months. Other cats show increasing difficulty with their  pregnancies, and in many instances, fail to become pregnant. The average  weight of the kittens born of cooked-meat-fed mothers is 100 grams, 19  grams less than the raw meat nurtured kittens. 

Regenerating Cats

When cats of the first and second generation cooked-meat-fed groups are  returned to a raw meat diet, they are classified as regenerating animals  of the first and second orders. Their progeny are then maintained on an  optimum diet to measure the time needed to rebuild their health to that  of the normal cats. It requires approximately four generations for  either order to regenerate to a state of normal health. However, because  of the lack of reproductive efficiency, very few deficient animals  regain the normal health noted before deficiency was imposed on their  line of cats. 

Improvement in resistance to disease is noted in  the second generation regenerating cat, but allergic manifestations  persist into the third generation. In the third generation, skeletal and  soft tissue changes are still noticeable, but to a lesser degree; and  by the fourth, most of the severe deficiency signs and symptoms  disappear—but seldom completely. 

One of the experiment's more  startling discoveries is that once a female cat is subjected to a  deficient diet for a period of 12 to 18 months, her reproductive  efficiency is so reduced that she is never again able to give birth to  normal kittens. Even after three or four years of eating an optimum  diet, her kittens still show signs of deficiency in skeletal and dental  development. When her kittens are maintained on an optimum diet, a  gradual reversal and regeneration takes place. 

The only other  portion of this book I want to bring forth just to show the difference  in all the types of processed milk and that what we call “milk” now is  really no longer a food and can cause serious problems for cats, dogs,  and/or people.  

The Raw Milk Versus Cooked Milk Feeding Experiment

This  feeding experiment involves four groups of cats. One group received a  diet of 2/3 raw milk, 1/3 raw meat, and cod liver oil. The other groups  receive a diet of either 2/3 pasteurized milk, 2/3 evaporated milk, or  2/3 sweetened condensed milk, plus 1/3 raw meat, and cod liver oil. 

The  results of this experiment correspond to those of the raw meat versus  cooked meat experiment. Animals on raw milk and raw meat reproduce  homogeneous litters, and the usual causes of death are old age and  injuries suffered in fighting. They are generally healthy animals with  normal anatomic measurements and good resistance to disease. Their fur  is of good quality with a notable sheen, and they show no signs of  allergy. 

The cats fed pasteurized milk as the principal item of  their diet show skeletal changes, lessened reproductive efficiency, and  their kittens present progressive constitutional and respiratory  problems as is evident in the first, second, and third generation  deficient cats eating cooked meat. 

Cats fed evaporated milk show  even more damage than their pasteurized counterparts while the most  marked deficiencies occur among those fed sweetened condensed milk. The  cats on sweetened condensed milk develop much heavier fat deposits and  exhibit severe skeletal deformities. They show extreme irritability and  pace back and forth in their pens. 
Francis M Pottenger, Jr, MD

Pat McKay:   With all the excellent information provided in Dr. Pottenger's ten  years of study, it is eminently clear that canned, dry, and cooked  foods, including pasteurized and other processed milk, are not for cats.  I would also extrapolate this information to include all dogs and other  true carnivores. 


Copyright © 2021 Pat McKay Animal Homeopathy - All Rights Reserved.

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