As an academics, studying canine behavior, lethargy in dogs is a common sign of many underlying issues. It may simply be an age-related downturn in energy, but it can also be a symptom of more serious health issues, like heart diseases or arthritis. Please contact a professional veterinarian immediately to get the most accurate diagnosis.

Hey, man don't worry, you're not being overly protective, you're just caring for your dog. Just go for a vet checkup to make sure he's okay.

Maybe your dog is just getting old and lazy like you. 😆 But for real, please take the dog to the vet.

Long-time dog trainer here. There could be dozens of reasons your dog may act this way. It might be behavioral or it could be health-related. You know your dog better than anyone. If you think something's off, I'd say trust your gut and get a professional opinion.

same thing happened to my pupper. Turned out she was just bored out of her mind. Bought her some new toys and she was back to her old self. But ur buddy's a senior, so might as well check with the vet.

I've got a couple of collies myself and sometimes they do go through phases where they act a bit out of the ordinary... But yeah, if ur worried, seeing a vet wouldn't hurt.

Hey there! Vet here. Changes in eating habits, activity levels, and sleep patterns certainly might indicate that something's not right. I'd suggest you take Buster to the vet just to make sure everything's okay. It might be nothing serious, but it's better to be on the safe side, right?