watchdog
guard dog

So I have no choice but to give you a guard dog.

But for tonight, you will return to your guard dogs.

I don't get very much now, no, and how do you like your guard dog?

There would be no chance of making a break now, not with guard dogs around.

"You didn't have the guard dog the last time I was here."

They were used as guard dogs and to find animals or people.

But she was after a guard dog, not a pet.

He was used as a messenger and a guard dog.

Once inside, he killed two guard dogs and entered the main building.

Thinking there was only one guard dog, they discover two in the house.