I have two 8-month old rabbit pets, and while my house is not very well designed for rabbit-proofing, I have given them a decent chunk of space where they can roam around 24/7.
I feed them a hay based diet, a small amount of pellets and some greens every day. They eat about twice their volume in hay alone. I only give them enough pellets to cover the bottom of their small bowls.
They have wood based toys that they seem to have lost interest in, and I'm worried that hay alone won't be enough to help them keep their teeth in order, in the long run. I sometimes volunteer at a nearby cat shelter, and one of the volunteers there suggested I take home some of the branches laying around (the shelter is surrounded by a very small area of trees). So I decided to bring home a few branches of wood, but I don't want to just give them wood that might be infested with parasites or otherwise harmful bacteria.
Are there some precautions I could take for their safety or if not, what can I give my rabbits to keep their teeth in check? Is hay really enough?