None for the Tubster. Since he pooped yesterday for the first time since Friday, I was assuming the opposite - that he was constipated from them. But I know this can happen in people too, and everybody, just like every kitty, can react differently. Although I have to say I'm not surprised 'cause I know there can be the same effects when people take antibiotics. Hopefully Amber gets rid of her gingivitis real quick. Poor kitty. Sore mouth and over active bum to boot.