usually because it can cause problems for their hips
because the dogs walk on all of their legs
because their pelvises are not designed to stand on two legs but most dogs can for a little while
Raccoons, like dogs, can walk short distances on two legs but almost always walk on all fours.
Koalas are not bears. Koalas have four legs which they use to climb up and down trees. When they are not climbing up and down trees, they are walking from tree to tree looking for more leaves to eat.
Hadrosaurs and Iguanodonts are both known to have walked on four legs. However, they could stand, walk, or run on two legs when it was useful.
A dog trots by means of propulsion with its four legs. Usually dogs walk with three legs on the ground at a time; dogs have two legs on the ground to save time while leaping.
No giraffes do not have three legs. Giraffes have only four legs. If they did have three legs then it would probably be hard for them to walk. Let alone stand.
Theropods only walked on two legs. Some types of small ornithopods were also completely bipedal.
Dogs walk on four legs and have tails of varying lengths. Dogs' hair can be brown, white, black, gray, or yellowish.
Tortoises have four legs that they walk with.
Well what else do they walk on
four legs