Hi, I've been giving my 5 guys about 1/2 a stick about 3 times a month for the past 2 years. (They've trained me to give it to them as their Sunday morning treat.) I have observed no ill effects from my clan of 5 to date-- minus the squabbling and thieving of leftover bits. :) Could it be something you're giving in conjunction with it or before or after it? Just a thought. Everything is so subtle with them. I went through months of allergy testing with my baby boy before a ferret-proficient vet discovered it was a collapsed trachea. Michelle and the fuzzy5 [Posted in FML issue 5141]