Cats won’t be happy about holding their bladder or bowels until you can let them out. Instead, most cats will decide to work with what they’ve got.
As cat owners, we want to encourage our cats to drink as much as possible. Usually, that includes constant access to water and multiple water bowl locations.
Cats need to have room to stay physically active and mentally stimulated – neither of which are possible from within a carrier.
Use a room
Use a portable enclosure
Make sure there’s enough room for everything
Use a level surface
Add some comfort items