Even little dogs need to be walked early in morning and late at night, plus a couple of times a day on top. Some cats will always want to go outside and become escape artists, others are happy to never go out. For mobility problems, cat food dishes and litter trays can be put on a table, ( not your kitchen or dinner table) cats will jump up to where they need to be. Amazon delivers food and litter, and litter tray liners that can be lifted out and put straight into a small bin bag with tie handles, then into household waste bin. When I walk my dog I meet and talk to so many people, same time and place, you get chatting as dogs will always want to stop and sniff bottoms. You can get a long handled pooper scooper that you set up with a plastic bag, though it takes practice to perfect. Same with dog bowls, dog will climb up to a table to eat, and dogs can be trained to go to toilet in a raised flower /veg type bed. Ideal if you are in a wheelchair, and you can always have a small seat next to it so you can reach poop without bending over too much. I love my dog to bits, the love she gives me is incredible and worth every penny of vets Bill's etc.