Yes it is an Opal, but that kind of brush wouldn`t do much for the fur. Actually you don`t even need to brush a Rex much unless it is molting. A slicker brush works best. Most rabbits are very scared of vacumms and loud noises, keep the rabbit away from the loud noises if possible. They don`t need a bed or cardboard box or anything like that. A great forum for rabbits only is http://rabbitry.teksigns.com/forum There are many experienced rabbit breeders there who can help answere your questions. Bucks(males) sometimes like to spray to "mark their territory", some are really bad about it, that is why he sprayed his cardboard box. Good playtoys for a rabbit include, dried pinecones, twigs, plastic easter eggs(with something like a bell inside is even better). Also, don`t feed any rabbits lettuce or spinach or anything "green" it causes diarreha.