Should you not let your puppy play too mch if he has a grade 3 heart mermer?

It is important to follow the recommendations of your veterinarian regarding activity restriction for a puppy with a grade 3 heart murmur. The severity of the murmur and any underlying heart conditions will determine the level of activity that is safe. In general, puppies with grade 3 heart murmurs should avoid strenuous exercise and activities that may cause excitement or lead to rapid breathing. This includes running, jumping, and fetch. Instead, opt for gentle walks and short play sessions to keep your puppy active without overexerting them. Always monitor your puppy's behavior and consult with your veterinarian if you have any concerns about their activity level or overall well-being.