Depends on what u wanna do sounds like i would try her if she is that nice no matter what but if u are looking to three day u need to look at how she recovers the next day I've known of dogs that can run 12 hrs at night and couldn't run 2- 5 hr day how she moves around while She's not been in a race more or less gong to a race if she does have a trait u can improve on breed her to something that will put that trait into the puppies.... Like the Mr.t dog off of troop Kyle Ladner owns recovers great and has great nose he also won the s&d in the USO I think ! Chase bred dogs are also good dogs to recover if that's a trait she could improve on