I have a few houses listed in which the owners have a litter box in one of the rooms. I've tried to tell them how that could create an unpleasant experience for the buyer but the owners don't seem too concerned. Either they don't care or they just move the litter box to another room. I can't force them to take it outside during showings. I don't want to be 'catty' but I know how this can affect a buyer's opinion and I would hope the sellers would understand why it's not a great feature.
After seeing the home the buyer may not recall there was a litter box but they may remember having an unpleasant experience while they were there. A bad smell really can cause someone to think the house stinks. We must appeal to all of the buyers'senses when showing a home. They say you only have one chance to make a first impression and you don't want someone to remember your house as being 'kind of crappy'.