One way to tell your dog is when it's bored is if it sits motionless with an empty expression on its face.
Dogs suffer from boredom when they aren't challenged enough.
In addition to barking, digging, and possibly escaping from the yard, they might begin gnawing on furniture.
You can feel the anxiety in their air. They require entertainment, and you require a respite from the stress.
Even if you're too busy or not at home to give your dog food or treats, there are plenty of other methods to keep them occupied.
If you see that your dog is becoming bored, you should consider ways to stimulate his mind and body.
Toys are an excellent means of providing mental and physical stimulation to your dog.