My dog has been taking Metronidazole since Sat. and today is Thursday. Well I stopped giving it to him yesterday and I was wondering if it is ok. The medicine was for him having runny poopoo and I had to put him on a diet of chicken and rice but he was getting backed up and not wanting to poopoo. So my husband looked it up on the internet and he read something about taking a match and sticking the sulfur part in his butt for a few minutes and this would make him poopoo and it worked. Jocko, my dog, is now eating his regular food and poopooing normal, so is it ok for me to stop his antibiotics?