My cat for a couple years has had excessive grooming, then looked like reaction from food. Did food test...been a couple years he still cleans excessively and seems to have anxiety... I have talked to the vet........cat has been seen..But its a difficult situation.. CBD oil was suggested has anyone tried it on their cats and if so where to get a GOOD brand with Certificate of analysis...Will think about trying it, just wish vets had more info on it