If you notice that your dog is not feeling completely comfortable in the water, a life jacket can help to make your dog more safe. Older or sick dogs cannot move very well in the water, which is why a life jacket is useful. In addition, some dog breeds are less good at swimming than others. One of these breeds is the dachshund, which is not a very good swimmer due to its short legs. In deeper waters, when stand-up paddling or on a boat, you should also pack a life jacket for your dog.