I don't know how to google for this, so I'll ask the hive mind.
I want to install a pet door in the internal laundry door. It has the cat litter tray and the dog and cat's food and water bowls and also access to the back yard. Eventually I'll get one of those pet door insert for the external sliding door, but for now I can just leave it open.
But how do I pick a door that both my medium sized dog and my 4kg cat will be able to use? Will a door big enough for Banjo be too heavy for the cat? Anyone experience with this?
(Maybe this should have gone in "Other pets" because the cat is more the problem here.)