I am looking for a wooden shelter to put in my shed as a warm place to snuggle as the weather gets colder. I have used cardboard boxes up to now which work well but thought I might as well buy something permanent. Anyone who has one of the natura shelters or similar, can you tell me whether they are big enough for two bunnies (one small, one medium)? I don't want anything so big it loses warmth but obviously want them to be able to fit in together. I considered just getting a 3' hutch but don't think that will be as warm and bigger than needed really.