If you have a dog that you can pick up, you can do this using your home scale. Step on the scale to find your weight, and then step on it holding your dog. Subtract your individual weight from the total of yours and your dog’s to find your dog’s weight. [2] X Research source If your dog is too big to pick up, weigh them using a scale designed for dogs at your vet’s office or local pet store.

Circle a string or ribbon from the widest part of their ribs around their back. Mark where the end of the string meets up with the rest; then, measure its length in centimeters and/or inches using a ruler or tape measure. Use the same process to measure the girth of the base of your dog’s neck, so you can tell how large an opening their life vest will need.

For the same reason, it’s also useful if the jacket has a leash attachment, so that you can pull or guide your dog out of the water.

This is essential not only so that you can keep track of your pet but also so that nearby boaters, swimmers, or surfers can avoid them.

Test your dog’s mobility by having them walk, sit, lie down, and run in the jacket. You want the vest to be snug but not so tight that it’s uncomfortable. When you have the jacket strapped on, be sure that you can fit two fingers between the vest and your dog’s body at the neck opening. Be sure that none of the fittings or attachments (like buckles and straps) rub against your dog uncomfortably since that can lead to chafing. Most pet stores that carry life jackets will do fittings for you. If you find that your dog’s life jacket does not fit them well, return it, and try another brand or size.

Many jackets come with handy quick-release buckles, so that they’re simple to slip on and off. For convenience’s sake, you should also make sure that the jacket’s material is durable, like sturdy nylon and neoprene, and easy to clean.

Be sure that the reviewers do not have a commercial affiliation with any brand.

The list of breeds that are typically water-shy is longer and more various than you might think. It includes everything from English Bulldogs to Chihuahuas to certain types of Terrier. As a general rule, if your dog has short legs or weighs less than 15 pounds, chances are they should have a life jacket. [9] X Research source Toy dogs are especially prone to being less than enthusiastic about water. If you have a pet that belongs to the Toy group, it’s advisable to get them a life jacket.

Canines with low body fat and short fur include breeds like Greyhounds, Salukis, Whippets, Dobermans, and Boxers.

If your dog has a seizure disorder, heart condition, or respiratory condition, it’s probably best to keep them out of the water altogether.

It is not a legal requirement to have a life jacket for dogs on a boat (as it is for all human passengers), but it is highly recommended. Significant safety risks include water that is deep, fast-moving, wavy, and/or prone to currents or undertows.