My 3 year old Netherlands Dwarf, Peter, had head tilt. I am not too sure on what caused it. We took him to a very rabbit savvy vet. I cannot stress enough how important it is to take your little bon to a vet that knows rabbits!!!! The wrong meds can kill a bon. Anyways, he most defiantly had head tilt, and the vet did an inner ear swab to check for infection, he said Peters ears were very clean but that is the only thing he could think of that would cause such a thing to a well taken care of rabbit. His head tilt progressed extremely rapid, he went from a minor tilt to rolling and severe vertigo within 3 days. The vet gave him steroids for 10 days by mouth twice a day, and 7 days of antibiotics via shot once a day. He started showing improvements by the 3 day of treatment, after the last steroid treatment he was 100%. No tilt, eating and drinking on his own, and very active and happy. I heard a lot of stories of head tilt taking months to recover from, by my little man did it within 10 days. If you catch it early and start treatment it can make a huge difference in the recovery. As for relapse in head tilt, i don’t know. Peter seems fine, but every time he cocks his head i have a nervous break down thinking it’s back. ): Best wishes to you and your little bon <3