The mood-boosting power of dogs is well-documented. If you've ever spent time petting a dog and gazing into his eyes, you've probably been lucky enough to experience that mood boost yourself.
But what if it's the dog who needs his mood lifted? Is depression in dogs real?
Some warning signs that your dog might be depressed look remarkably similar to a human's. Here are three signs to look for:

If you think you're dealing with dog depression, the first thing you should do is see a vet. Symptoms of dog depression could also mean a dog is in pain. A dog experiencing discomfort might eat less, sleep more or show a change in energy level. A vet can help you determine if depression or illness is to blame for the change in your dog's temperament. Make sure you're clear with the vet on how your dog has altered his behavior.
"As with many other aspects of caring for your dog, these signs will be more obvious to you (even when they are subtle) if you have a good idea of your dog's 'normal.' This includes his normal attitude, energy level, gait, appetite, thirst, sleep patterns and other physical and behavioral patterns. After all, if you don't know what's 'normal,' it's much more difficult to recognize what's not," Dr. Jason Nicholas writes in Preventive Vet.