My rabbit Max just got over a serious case of GI stasis. He is recovering well but since recovering, I have noticed that he has started licking shoes. Mostly mine, but he did do the same to my husband while he was wearing his slippers one day as well. He has never licked anything before and it is unusual for us to have shoes around him as we usually take our shoes off in the basement where he is not allowed. Do you think this is just a wierd quirk or could it be a sign of something I should be concerned about? Thank you.