“I've got a Standard Poodle who has a sensitive stomach. I was honestly worried about giving this product to her, but she loves it and hasn't showed any signs of it upsetting her stomach (we have to keep her on one food and little amount of treats or she gets diarrhea.) We gave been using it now for a year. No problems with fleas or ticks at ALL!! Love not having to put that nasty stuff on her back and having her try to rub it off or on us after application!!”