I bought a stroller for 3 reasons: 1 - When I go for a powerwalk I go a lot further than my 2 can go (one has a serious heart murmur and the other is too small - so I let them walk till they're tired and then throw them in the stroller so I can keep exercising) 2 - When we are at a fair or other crowded area I would rather they have somewhere safe to be in rather than getting stepped on and 3 - When we go to pet stores and/or the vet I don't want them on the dirty floors.
Those are my reasons