Does anyone have experience with this antibiotic? My vet prescribed this for Holly Golightly last week because of gingivitis. It's obviously working because her breath doesn't stink like a sewage plant anymore. However, I think it may cause constipation. I've been so stressed out with Buster's recent surgery that I haven't been paying attention to Holly's needs as much. I know that antibiotics can cause diarrhea but what about constipation?