Hi... My shihtzu is 4 months old and has been itching all over. His Skin looks nice and baby pink and cannot find any ticks or fleas on him since hes got so much hair. What could be the reason for itching under his belly and mainly on his neck. Cannot find any redness. Could it be dry skin in this weather. What can I do. I have bathed him once 15 days ago but hes been itching even before that .. though the itching has increased quite a bit. Can we use diluted ACV for such a small puppy to stop the itch.?? If so, what is the proportion and how often?