My dog chews and licks her feet all the time. I think it's a habit.
This is very unlikely to be a habit. It is far more likely that their feet are itchy and they are chewing/licking to try and get some...

Fleas - Basic Facts and How to Control Them on Your Pets
Fleas are the most common parasite that pet owners face. They are external parasites that feed on the blood of their hosts. Fleas can be...
