I have read that large-breed dogs need lots of exercise. He hasn't gained any weight and we live in the south, so it is very warm outside. However, if you have not had him checked out by your veterinarian, I would suggest you plan a visit soon. Certain large breeds frequently develop orthopedic problems such as hip or elbow dysplasia, or heart conditions like subaortic stenosis.
Orthopedic problems can cause pain in the joints or bones and inhibit movement.
Assuming your dog is medically sound and stays that way, he may become chronically lazy if you do not encourage him to exercise. Bring him with you for regular walks or jogs around the neighborhood. Inc. All rights reserved.