Show experiments in breeding animals boston expert experiments ments in the breeding of animals similar to those car on with plants by luther burbank are announced by dr earnest castle a at harvard arvard ll university dr castle has been able to breed a race of guinea pigs with four toes on the hind foot where usually there are only three to invent a new color for the guinea pig the cinna mon which was not known to natural ests till his were ere bred a silver guinea pig that albo is new 0 to o science and two kinds of rats |