Is 32% protein too high for my indoor Cavalier King Charles Spaniel?

Hello, neither of them are wrong or better than one another.

The difference being is that the food with the higher protein is likely leaner (more energy is derived from protein) and has less carbohydrates or fat associated with it. Now, unless your dog is working dog, she may not need that much extra protein. Vice versa, the lower protein food may have a higher carbohydrate or fat percentage.

Both foods however, if formulated for "maintenance" should meet the AAFCO requirements for energy of an adult dog. Meaning, you're going to be feeding the same amount of energy to Chloe, except one is going to be coming mainly from protein and the other one from fat and/or carbs. AAFCO recommends a minimum protein content of 18% in canine dog food formulations for maintenance. Therefore both of the foods you were feeding meet this minimum requirement.

One of the contraindications for a high protein food is if your dog has kidney disease. With kidney disease, excess protein may worsen this disease and therefore, kidney diets actually contain less protein.

Hope this helps.