If you decide to let your dog snack on some capers, the safest way to serve them to your pooch is to soak them in water first to remove as much of the brine solution as possible. You can then either serve the capers on top of your dog’s usual food to add flavor or give it to them in a separate bowl as a snack. When introducing any new food to your dog’s diet, you should do it slowly and cautiously. After eating something new you should monitor your dog for any signs of discomfort. If your dog reacts to ingesting something he hasn’t eaten before, you should contact your vet for advice.