I used to be an owner of 2 dogs and 2 cats living together. The dogs were more playful than the cats as you would expect. The cats were always in their own zone minding their business. All 4 (Both cats and both dogs) still got along well. I walked and fed the dogs every day and occasionally took them to dog parks. The dogs were trained by professionals, and I followed along with day by day instructions since they were puppies. One of them is 5, the other is 3. Now, I currently live with no pets.