The Zyrtec seemed to work ok but I had to bring him to his food or take his food to him almost all weekend. Once the food was in front of him he ate readily. Last one I gave was Saturday PM cycle and skipped last night so I could give Mirtz this morning. I have to make sure he is eating when I am at work. I might try 1/4 pill of Zyrtec next weekend (he got 1/8th pill Friday & Saturday PM).