You might also hear phrases like:
* "He's feeling under the weather" - This is a more casual way to say a dog isn't feeling well, which could include being tired or injured.
* "He's got a limp" - This specifically refers to an injured leg.
* "He's been sleeping a lot" - This is a common sign of fatigue in dogs.
It's important to observe your dog's behavior and seek veterinary attention if you suspect an injury or illness.