It may work or may spook the coyote just depends. I have used one but only a couple of times and decided too much trouble plus the fact your are spreading more scent from putting up the decoy and from the scent of the decoy itself.

I have a plastic coyote decoy (named Nancy Pelosi). I guess it looks like a big tough male, because the coyotes that came to it wouldn't come close. They'd stop a couple hundreds yards out and sit down. It didn't save their miserable flea bitten lives, but closer would have been nice. I'd suggest that a wimpy looking coyote decoy might be better than what I have.

The neighbor's yapping dog will work.

Hang a turkey feather from a tree by a string. Just above the ground or grass so the breeze can move it around. You'll be surprised at what it brings in.