Scratching and itching, very sudden
I know there's a lot of topics about itching already, I've read a bunch, but still looking for opinions and ideas. Hugo started scratching 5 or 6 days ago, and it seemed to come about so quickly. He never seemed anyway to jusybs ratch a little, it was just suddenly scratching like crazy. We go for a walk and he keeps stopping to scratch. Not sure it's related, but the last 2 nights he has had diarrhea and went on the floor, he has never done this before. He has been eating TOTW, the fish one, forget the name. He has always been fine with it. I started giving him Fish Oil, not sure how long that takes to start helping if it is the problem, I used to give it to him but haven't on a while.
I don't believe that it's fleas, I don't see signs of them, and he is on flea and tick preventative. I know it's still a possibility, but I don't see the signs.
I'm thinking a vet visit is in our very near future, but still wanted some input.