Yotes will take full grown deer.
How do you know?
I mean I'm 49 years old and I spend a lot more time in the woods than most people. I have game cameras in woods almost year round. And I've never collected a shred of evidence that proves a Coyote will consistently kill a healthy mature deer.
There�s a video slideshow of yotes taking down a big buck from start to finish right in front of a trail cam.
Oh and coydogs are not sterile. They just don�t rear their young like coyotes do. Also dogs and yotes breeding cycle rarely coincides hence why the Woods ain�t overrun with coydogs