If you have both a puppy and an adult boxer, it's best to feed them separately with food formulated specifically for their respective life stages. If you're transitioning your puppy to adult food, do so gradually over a week or two by mixing increasing amounts of adult food with decreasing amounts of puppy food. This helps prevent digestive upset and allows your puppy to adjust to the new diet.
Always consult your veterinarian for personalized advice based on your boxer's specific health needs and dietary requirements.
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