Bella started chewing one of her back paws (mainly around and inbetween the pads) on Thursday and letting out a little squeak now and then while doing so. I had a good look at her paw and couldn't find any problems. She stopped yesterday but today I noticed she has started chewing one of her front paws. Again, nothing unusual upon examination. Today when we were playing fetch she stopped suddenly and started chewing her back paw again and not putting asny weight on it. So I had another look, it is all fine and she didn't seem in any discomfort and walked fine straight away. Any ideas? At first I thought she just wanted something to chew because her mouth is sore from teething (she is only 4 1/2 months old) but now I don't know!