Creative KONG Toy Fillings: Fresh Ideas for Busy Dogs

KONG toys are hollow, durable chew puzzles that let you turn mealtime into a fun enrichment activity. Instead of “just peanut butter,” think of the KONG as a food puzzle that challenges your dog’s mind while rewarding them with tasty bites. To keep things fresh (and cool!) in summer, you can freeze these treats—but the ideas below work all year. By varying the fillings and preparation, you’ll keep your dog interested and get extra nutrition into their snack time.

Start with Their Regular Food

A great place to begin is with your dog’s normal diet. You can stuff a KONG with dry kibble or canned (wet) dog food as the main filling. If using kibble, mix it with a little warm water or low-sodium broth to soften it and help it pack in the toy. Stir in a spoonful of unsweetened pumpkin puree or plain yogurt (no artificial sweeteners) to make the kibble mushier and more enticing. This not only helps the food stay in the KONG longer, but also adds moisture and flavor. For dogs that eat wet food, you can simply fill the KONG with that and seal the small end with a dab of peanut butter or yogurt to prevent leaks. The key is to create a thick base—something your dog has to work at to lick or chew out.

Add Fruits and Vegetables

Fresh produce is a healthy way to bulk up the filling and provide vitamins. Many fruits and veggies are safe and nutritious for dogs. Carrots, green beans, peas, blueberries, and pumpkin are all great options. Dice or lightly steam veggies like carrots and green beans so they fit in the KONG, or mash soft veggies like cooked sweet potato or pumpkin. Slice or mash fruits (no seeds or pits): apple (no core), banana, melon, or berries. These add fiber and natural sweetness. You can mix a layer of diced apples or carrots into the kibble, or freeze small pieces of watermelon or blueberries inside the KONG with the wet food as a cooling summer treat.

(For a full list of dog-safe produce and pantry staples, check out my Pet Pantry Picks post.)

Use Dog-Safe Pantry Staples

Dog-friendly spreads, dairy, and proteins can make KONG stuffing extra tempting. A smear of peanut butter (all-natural, xylitol-free) is classic—but give it in moderation, since it’s high in fat. Plain Greek yogurt or low-fat cottage cheese mixed into the filling adds creaminess and probiotics. A hardboiled egg (shelled and mashed) is another protein boost. Lean cooked meats like chicken, turkey, or salmon add extra protein and omega-3s. You can finely chop leftovers or shredded meat and mix it in. Even plain popcorn (air-popped, unsalted) or a sprinkle of grated cheese can be a fun, crunchy layer. Just be mindful of calories and any known allergies.

Layer and Seal for a Challenge

Build the KONG like a mini “meal” from the inside out. You might start with a small, high-value treat at the very tip to grab your dog’s attention. Then add a layer of kibble mixed with diced veggies or a spoonful of wet food. Alternate textures and flavors as you fill, pressing each layer in firmly. Plug the wide opening with one last treat or dollop of spread so your dog has to work through it

. This layered approach makes the KONG last longer and encourages problem-solving.

A well-stuffed KONG keeps your dog busy, happy, and mentally engaged—even when you're not around.

Chill Out: Freezing for Extra Fun (and Cooling Down)

In warm weather, or anytime you want to make the treat last longer, freeze the stuffed KONG. Freezing solidifies the ingredients so your dog spends more time licking and chewing. It’s especially effective if the filling has some moisture—like kibble soaked in broth, pumpkin puree, applesauce, or yogurt. Just stand the KONG upright in a cup or egg carton and freeze overnight. In summer this also helps cool your dog down. For dogs with sensitive teeth or puppies, you can thaw it slightly before serving or use softer fillings to start.

Tailor Fillings to Your Dog

Adjust all of the above to suit your dog’s diet, preferences, and needs. If your dog is on a weight-control plan, focus on low-calorie fillers like veggies, unsweetened pumpkin, and broth. Allergies or sensitivities? Swap in safe alternatives and introduce new foods gradually. Smaller dogs or seniors may do better with purees or softer textures, while power chewers might need tougher, frozen combinations. Always start with familiar foods that agree with your dog, and when in doubt, ask your vet.

The Bottom Line

Filling a KONG with healthy, creative ingredients turns snack time into mental exercise and meaningful enrichment. Rotating through different textures, flavors, and prep methods keeps your dog engaged and excited about their KONG. Variety is key—keep the fillings seasonal, nutritious, and tailored to your dog’s needs. With a little planning, your dog can enjoy a rewarding, brain-boosting treat any time of year.