Dom R
Junior Guinea Pig
The antibiotics I mention aren't licensed for guinea pigs, but I've used them many times, over many years and they have worked wonders for anything abscess related. When Benjamin had a retrobulbar abscess we initially started him on Zithromax, and although that held things at bay, we weren't seeing any significant improvement. After changing to the combination of Marbocyl and Metronidazole, Benjamin's eye improved. He was on antibiotics for many weeks, to make sure we had definitely eradicated the abscess.
Marbocyl is a tablet and Zithromax and Metronidazole are liquid.
Here is a video showing me giving Zoltan Marbocyl and Metronidazole
Medicating your guinea pig - Instructional video on Facebook
Just got back from the vets, they gave me some antibiotic eye drops as he's developed an ulcer on his eye now, too. They also tried selling me Metacam licensed for guinea pigs (which was 3ml of cat metacam and for him to have 6 drops per day). I knew that wouldn't be strong enough so I argued and had to sign a consent form for dog metacam, it's a bit daft if you ask me, I've never had to sign anything for metacam before.
They also didn't stock any of the other antibiotics, so I'm going to have to hope it settles at least until Monday, when I see Ellie. They also argued that Sulfatrim was good enough for the abcsess, and that they've had good success with it in the past. They want me to go back next Thursday, but I think I'll see what Ellie says and go from there; I do trust Ellie a lot more.