I just gave my 9 month old and 4 year old huskies a flea and tick bath using hartz ultraguard plus 2 days ago. So far they are still acting normal but they keep having loose stool. I used the recommended amount which was 1 tbs per 15 pounds. We had this same problem 3 weeks ago when we gave them their first bath before we moved into our new apartment. At first I thought it was because we had changed their dog food ( the kind we used to buy was not in the area we moved to). But I noticed a red tinge to the stool. Well after about a week and a half the loose stool stopped and they were back to normal. They were eating the dog food and digesting normally. Well we just gave them another flea and tick bath after waiting 3 weeks (bottle says you can repeat the bath once every week) and the loose stool has started again. I know its not their dog food this time and i am guessing since the only other thing they have in common is the shampoo i am very worried. Especially after reading all of these stories.