I went to a house where the old owners had somewhere around 50 cats. they had tipped a sack of cat litter onto the kitchen floor and let the cats do their business there, and it looked like it hadn't be cleaned up for a year. they also had a parrot on an open perch, and there was a pile of poo a foot high under the perch, on the floor of the living room. I had gone there to fix a phone ( I worked for BT). I made an excuse about the overhead wire coming in from the back garden, opened the back door and legged it, gasping for air.
oh, happy memories!