I'm not sure. We got him last June.... He was dumped/lost at my daughter's co-op barn. I took him to the vet who checked him over really well. He didn't mention any issues with his teeth? He also eats his pellets and fresh greens/veggies just fine. He chews wood (and other stuff he shouldn't like my window sills and vertical blinds.....grrrr.....).Are his teeth okay? I mean, I'd expect more than just refusing hay if teeth were a problem, but one of my bunnies simply could not eat his hay because his teeth were malpositioned. He could eat feed tho.