We have recently adopted a rescue dog. He has tear staining around his eyes and is often chewing and scratching his paws and legs. He has been wormed and fleaed. He was like this prior so not a reaction to these treatments. I have seen an ad for Nutripaw that is a probiotic that helps with the above. Do these actually work, or has anyone any recommendations to what may help? The vet didn't say much and said his eyes could be an allergy, stress or conjunctivitis (which it really doesn't la ok like).