My Guinea pig that is about 1-1/2 years old has been battling sinus congestion for months. He was on antibiotics after seen at the vet, started to get better then got congestion again. We went back and had a nose swab done to find he had 2 bacteria’s (strep and I can’t remember the name…will update later) and the prior antibiotic he was on would only treat one of those. They put him on Enroflixacin for two weeks. He got better but after a week he started back with congestion. We switched hay as well in case it was an allergy. He is eating, drinking and pooping but he is loosing weight (755 grams currently). There are times he sounds very congested and hard to breathe. We have a vet apt again but not sure if anyone else has experienced this so we can help try to figure this out. We have another Guinea pig that has not gotten sick and is quite healthy. I’m at a loss for what to do and not sure if he is suffering at this point. Any advice or guidance would be much appreciated! Thank you!