Here's my take on decoy dogs. I use a full cat, she's 10yrs old and has always been somewhat shy around coyotes. She will run out at about 40 yards and then come back in. This works great for what I need her to do. A friend of mine has a brother to her and he will chase them into the next county. It's not much of a problem in the spring because the adult coyotes are usually willing to stand their ground. But I like to use a decoy dog all year around, and his dog can be too intimidating in other times of the year. I feel you're always better to have one more on the non aggressive side if you want to use it year around. If just used during the pup season then it doesn't seem to really matter. For me the use of a dog is more so for a visual aid and attractant, plus to take the attention off of me , if I need to move around for better position. Even as submissive as mine is, there has been times when I could not get a coyote to come in because she was there. I've had them sit down at about 400yrds and just watch. I find this happens more in areas where the coyotes have been ran by sight hounds.