Has anyone had any experience of the new drug Zenrelia ? My Cocker, Jaffa has environmental allergies and a constant build up of wax in his ears with nibbling of itchy paws. He is 8 and been on apoquel ( with no side effects ) for most of his life and also immunotherapy for the last 3 years. It has been suggested to me by my dermatologist that it might be a good idea to try a new drug Zenrelia instead of the immunotherapy as results have been positive regarding treatment of inflammation.