A friend directed me to this site today when I told her I had given my kitten Hartz hairball remedy. Hours after I had given it to him, he started gagging consistently for 15 minutes. I took him to the emergency vet and they couldn’t find a thing wrong with him. He seems to be getting better… it’s been a couple of days and he’s still gagging but not very frequently. I’m going to call my normal vet today and ask them about this product.