Cites 'Miscellaneous Inquiries', Chemist and Druggist 2940 (13 June 1936), p. 686.
Description:

'The following table shows the difference between cows' milk and bitches' milk:

   Cow... Total Solids, 13.5.. Fat 3.6.. Casein 5.5.. Milk Sugar 3.8

   Bitch... Total Solids, 22.8.. Fat 8.8.. Casein 11.6.. Milk Sugar 1.5

In order therefore to make cows' milk suitable for puppies, the following is a necessary mixture.

   Cows' Milk........ 15 oz.

   Casein.............. 2 1/4 oz.

   Cream.............. 2 1/4 oz.

   Water................ 5 oz.

Mix the casein into a paste with the water, then add the milk, stirring thoroughly. Put in enamel saucepan and bring gradually to the boil: biol for two minutes. Set aside to cool add the cream and stir well. That is a practical recipe which was printed in a recent issue of Chemist and Druggist, and it shows how easily the difficulty of feeding motherless puppies can be surmounted. It is hardly necessary to point out that the food should be fresly prepared. The above will make approximately a pint and a quarter. The liquids are meant to be in fluid ounces (measured), there being 20 fluid ounces in a pint.'

Cited by Medicus, 'Notes For Novices: Milk for Puppies', Our Dogs 104 (23 Oct. 1936), p. 328.
Description:

'I have received several letters about my "Note" of July 3rd on bitches' milk. One comes form a Scottish firm who make dog foods. They say:-

"We see in your 'Notes for Novices' in Our Dogs of July 3rd the analysis you give for bitches' milk, being interested in the sale of Full Cream Milk Food for bitches in whelp and puppies. You will see by the following analysis we received recently from the Royal Veterinary College of Edinburgh there is quite a difference from what you quoted from Chemist and Druggist,

Bitches Milk.. Total Solids, 24.6.. Proteins 11.2.. Fat 9.6.. Sugar 3.1.. Ash 0.7.

This, we take it, is more likely to be correct. As we manufacture an entirely whole wheat meal dog food, without anything being extracted or anything added, we noted with great appreciation your remarks on the feeding of dog cakes."

There is not any material difference between the two sets of figures; the basis of calculation is rather difference, and the figures I gave may be relied upon absolutely as a guide to the adjustment of cows' milk to bitches' milk.'