A cat without a proper litter box will just use the carpet. A dog without a cozy bed will end up on the couch.
Location is important with a litter box. “A cat doesn’t want to
travel a long way to go to the bathroom any more than you do,” says
Mieshelle Nagelschneider, a feline behaviorist and a consultant at the
Cat Behavior Clinic, near Portland, Oregon. Place litter boxes (one per
cat, if you own a few, plus one box they can share, says Moore) in quiet
areas throughout your home. Plug in a night-light beside each one so
your cat can find it in the dark. Cats dislike strong odors (even air
freshener), so use uncovered boxes and unscented litter and scoop out
each box every day. Dogs are far less persnickety about where they
relieve themselves, but do them the favor of regularly picking up the
poop in the backyard. Cats and dogs also need spots where they can
cuddle up and feel safe. “A dog needs a crate like a teenager needs a
room,” says Dodman. Provide a crate or a cozy bed, and make it taboo for
your family to pester the dog while he’s in it. Cats naturally want to
climb to an optimal vantage point, so set up a place where yours can
look out a window.
So choose a proper beds for your pets is very important.