I was wondering this too, recently, when I went to pick up my horse feed from P@H! (its the closest place, I cant afford to drive miles every week to buy horse feed). To be honest the pet shops can advise people all they like about keeping the bunnies indoors but I think another problem is that people think with the best intentions that they will keep the rabbit indoors, and then it becomes problematic to give it enough space (especially with having to fit in a Christmas tree etc!!) or its not properly litter trained and the parents get fed up of clearing up after it or the simple novelty of having an indoor rabbit wears off and then they are put outside in unsuitable weather.