The foot was the size of the foot of King Henry VIII, who standardised the weights and measures of Britain, frequently to his personal dimensions. Hence, they became known as IMPERIAL measurements.
Cats feet are called paws.
The fingers of the feet called toes.
Horses feet are called hooves.
The feet of an owl are called talons.
Having two feet is called bipedal.
It really depends on the animal. Some animals' feet are simply called feet. However, some of them have specific names. For some, like the dog, the feet are called paws. For some, like the cow, the feet are called hooves.