Cat puke/hair balls. Easily over 100 in the lady’s 1 bedroom apartment. 2 cats, but if I remember right only 1 was the culprit. She had us move the bed to clean under it too and there had to be another 50 under the bed alone. The customer wasn’t willing to pony up for the full treatment (pet enzyme, extraction, buff), so we just cleaned as normal with 101, citrus boost and UC (orange deod). Suprisingly it cleaned up great. I, like others, have many more but I try to forget them.
My employee has worked for other CC as well and he came across a house where the lady had 15-20 cats closed up in one room. He could smell it before she opened the door (and lost his lunch outside after she opened it). Didn’t clean it (called social services) but said the room was at least an inch or two deep in cat poo across the whole room. He has some other crazy stories too (cat carcas under the couch). Amazing how some people live.