I gave Milo and Marlee a dose of the worming medicine Saturday afternoon. Since then it seems like they've both had stinky gas! And their stool has been a little looser (not runny at all, just not as fully hard as usual). Is this just a side effect of the medicine? I had not noticed any signs of worms, but the vet told me that since I got Milo from the shelter it would be a good idea to worm him several times and I might as well do Marlee too. Anybody else seen this happen after worming?