PRESENTED BY THE DOMESDAY BOOK OF DOGS Fixing Type In Your Strain. For anyone interested in purebred dogs there is an excellent breeding regime expounded by the late Dr. Clarence C. Little in his book the Inheritance of Coat Colour in Dogs, 1957. Using Dr. Little’s method it may be possible to achieve their ideal type in a breed without too much outlay. The actual concept can be summarised in three steps: Step 1. Choose three individuals, one dog and two bitches, that best fit your aspirations. This will be your P1 or parental generation. Step 2. Mate the dog to the two bitches and this should supply you with two litters. This is to produce your F1 or first filial generation. Compare the two litters together and pick the single best male out of all the pups. Then from the opposite litter choose the best two females. Your F1 generation should now constitute one dog and two bitches. Step 3. Mate the dog to the two bitches (his half-sisters) to produce