Well here I go again with my two cents.A running buddy of mine had two J-Birds x Loy!s Jenny that he just sold last week.I hunted with him from the first time that they were cast.They started very quickly,and learned to run gray fox as well as coyote.He placed them both in puppy hunts with a very good group of pups.He has four younger pups to start,so he moved them as he is limited to space.Hope this helps ,good luck and good hunting.
I have 3 young dogs I have raised from pups out of a Sticker gyp. They have above average speed and plenty of bottom. No majot feet problems that I have experienced. I have another litter due this weekend. Hope this helps.