I would really appreciate some input on this rabbit. 3,5 year old rabbit where the owner recently noticed that the lower incisors were discoloured and longer. I suspect malocclusion and feel that the upper incisors are shorter than normal. Cheek teeth look normal, but not investigated under sedation. He is a rescue, so we don't know how long it has been like this or if it is pathological or anatomical in origin. The owner wonders if it is painful, but I suspect we have to investigate under sedation and do x-rays to answer that? Any obvious reasons for the discoloration?