The possessive form is the dog's paw.
Paw
Why does my dog's paw turn under when walking
If the paw has been injured, bruised, or cut recently, it might be swollen. Otherwise it probably just means that one paw is bigger than the other. Nothing to be worried about.
The plural of paw is paws. As in "the dog licked her paws".
the cats paw lets it balance and the dogs paw doesnt
The rabbit's paw could be cut, there could be a broken bone, there could be a bruised foot.
A dingo is a wild dog. The dingo does not have thumbs on its paw. The paw is almost exactly the same as a domestic dog. The difference in the paw is the dingo can rotate the wrist enabling the animal to use its paw like a human hand.
rub peanut butter on the dogs paw dah
Son=mething is probably wrong with the paw.
To answer your question, make your dog "sit" and then "Shake a paw". Do this about ten times and the paw they put up most often is the paw they use most often.
The dog may want a treat or have to go potty