Just over 3 million experiments were performed upon animals, mostly rats and mice.

Do we have a need to eat meat or to conduct experiments upon animals?

It was a carnivore and preyed upon animals close to its size.

They cannot act upon their plants and animals without being acted upon in return.

Although they feed mostly upon live animals, they will sometimes eat eggs.

This fact has been put in the clearest light by extensive observations made upon animals.

There can be no doubt that the results of such observations upon animals are applicable to human beings.

The surest experiments are made by the use of the elements or upon animals.

Effects upon animals Unwanted dogs and cats may have been acquired from any source.

Migration is a common effect of winter upon animals, notably birds.