Dr. Anukarna Singh
First we would have to understand the reason, if it was deficiency related it should've come down with the supplements. Another reason can be enzymatic insufficiency, you can discuss this with your doctor/ take a consultation on the app and start treatment for this if the other symptoms are matching with the condition. If it is a behavioral issue you have to modify that by correcting the pup when he does this or you can add small amount of pepper powder on it to make it taste bad to discourage this behaviou