Luckily, there are ways to help your dog move past his depression, and they don't all involve medication.
The best way to treat depression in dogs is to engage them more. Taking frequent walks, initiating more playtime or even just spending more time together can help bring your dog out of his depressive state.
"More social interaction is good for a dog's emotional and physical health," Sackman said.
If a little extra TLC isn't working, you can talk to your dog's veterinarian about possibly putting him on medication. Dogs can actually take some of the same medications to treat depression that humans do, such as Zoloft and Prozac. However, you should never try to medicate your dog without consulting his veterinarian first.