That’s great that you are doing some research before getting a bunny, welcome to the forum!
The main thing is diet, as you mentioned, and you will likely need to spay or neuter if you get a young bun. Neutering is somewhat optional for males, but most people choose to neuter males to improve litter box habits and other behaviors that can be annoying (like circling and nipping your feet trying to mount them
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For females though, spaying is done to prevent uterine cancer, which has rates between 50-75% (along with improving litter box habits, like males) and can cut your bun’s life very short. The spay procedure is invasive, and it can be hard to find a vet that will do it in some places. It would prob be a good idea to scope out vets before deciding to adopt a young female bun.
I always advocate for adopting from a rescue if possible though, as then the bunnies are spayed and neutered already, and you have a better sense of their personality. Heck, you might even be able to adopt a already bonded pair.
But I know there aren’t rescues everywhere, and young bunnies are quite irresistible.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.