We are on the fifth shot today of Payton's allergy shots going every other day. I have noticed an increase in itching and major paw licking. His paws are very red and swollen looking between to webbing and he seems to have a dry mouth. Is this to be expected with these shots because you're trying to build up the dogs immune system to the things they're allergic too? I wanted to see if anyone has first hand experience? Thanks!