My rabbit has been undergoing treatment for chronic snuffles since July ‘23. She’s just home from her second rhinostomy.
obviously a bacterial culture swab so you can know exactly what you’re dealing with and therefore can use targeted antibiotics would be best, but if that’s not possible I would discuss nebulising with your vet. There’s a variety of antibiotics you can use in a nebuliser and it can be a lot more gentle on their stomach than oral antibiotics.
With penicillin, those injections seem very far apart to me. When my poor was prescribed penicillin injections, we did the injections daily for a week. We saw little to no improvement. We’ve also done marbofloxacin which did clear up the infection in her nose but she developed rhinoliths in her nose due to excess discharge so her symptom’s never fully went away (hence, x2 rhinostomys) but for a rabbit who doesn’t have rhinoliths it could work (but again, depends on what is causing infection). Funnily enough oral baytril didn’t make a dent on her symptoms, but nebulised baytril did seem to help a little. Right now we are just doing f10 at a 1:250 dilution x2 daily in a nebuliser. So far, no sneezes!