Well, I live in a single wide trailer with 2 bedrooms, but the second is closed because it has all my ex-step-daughter's stuff that my ex-husband still has to get, hmmmm its been a year, somehow I don't think he's going to get it
anyway, my highest number has been 9 and 2 dogs with just me and I had 5 litter boxes at that time (2 in the bathroom and 3 in the kitchen, i have a big kitchen) and I can honestly say that I have never felt crowded. The more the merrier I say!! I would love to have more kitties, but with Saph & Simon being FeLV+ my options are limited, and I would take in more positives, but Simon is a nasty boy and beats the pooh out of any other cat. Need to keep stress levels down for their health.