More often than not pets, (in particular dogs as they are more likely to make noise) are banned, or you need prior approval.
One of the apartments on floor below and opposite me has a dog, I've only heard it barking a couple of times when walking past her door, but the apartments have service spaces between each apartment so not much noise. Direct neighbours seem fine with it.
Are you looking for ground floor apartment with a garden? If so you should bear in mind that many people have a (somewhat irrational) dislike of ground floor apartments, so selling might be more difficult.