HUMANE TREATMENT OF ANIMALS USED IN RESEARCH 157 
TABLE 1 - TOTAL NUMBER OF ANIMALS USED IN 1960 
(57 Institutions) 
Mice 
2,003,027 
Rodents * 
670 
Rats 
516,379 
Cattle 
582 
Rabbits 
140,120 
Peromyscus 
400 
Guinea Pigs 
88,553 
Doves 
300 
Dogs 
61,876 
Opposums 
228 
Poultry 
45,789 
Alligators 
224 
Hamsters 
33,411 
Parrots 
150 
Frogs 
20,142 
Crayfish 
144 
Cats 
19,472 
Snakes 
132 
Rhesus Monkeys 
7,078 
Amphibians* 
130 
Fertile Eggs* 
2,250 
Ground Squirrels 
102 
Sheep 
1,999 
Lizards 
75 
Turtles 
1,942 
Turkeys 
50 
Goats 
1,703 
Deer 
26 
Swine 
1,561 
Ferrets 
25 
Other Primates* 
1,266 
Armadillos 
15 
Toads 
1,200 
Racoons 
4 
Horses 
1,052 
Mules 
3 
Reptiles * 
833 
Elk 
2 
Pigeons 
794 
Ante lope 
2 
* Not otherwise designated. 
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