Absolutely! I had an Aussie mix that developed allergies when he got to be about 9. The vet gave special shampoo to use, I changed his food to grain free, and he still had issues, although not as bad. You should really take your dog to your vet and have them take a look, as it could be a number of things, not just a simple allergy.

I had a similar situation. I tried mixing the wet and dry dog food together, slowly weaning him off the wet food. You can also add some warm water to the dry food to soften it up. One other thing I would suggest if it continues, is to check with your vet to make sure your pup doesn't have an abscessed tooth or something going on with their gums.