The vet assumed there was an abscess on the inside of the nasal passages, after the two nose flushes it came back (both flushes were followed by 2 weeks of baytril). There were no external signs of an abscess. To get Niki to take his medicine originally I sat with him on my lap and his bum to my stomach. I'd hold his head still with one hand and put the medicine in with the other. I followed this up with some yogurt treats or fruit drips, whatever the pet store had as treats. After 6 months on and off meds, he figured out that he would get a treat if getting the meds. Twice a day I'd approach the cage with a syringe in one hand, a treat in the other. I'd have him smell the treat, and when he opened his mouth to eat it, I'd put the syringe in. At the end of his life, he'd still come up to get his medicines. Best Rabbit Ever.
As soon as our second rabbit showed signs, (sneezing) we took him in, he was put on his own round of baytril, and nothing has happened ever since. The third rabbit came into our house when we thought Niki had beaten it. Niki started up again, Sarah sneezed once, and we put her on it without even asking whether or not it was actually pasturella. All three rabbits lived in the same room until the end of Niki's life. They lived in a large custom-built cage, each with their own area but they had at least one wall they could visit the other rabbits through. Tido took to cleaning Niki's face when Niki wasn't feeling well. They wouldn't get along outside of the cage, but through the bars passed an unbelievable amount of love.