Take her to a decent vet mate and take there advise. Some dogs just never come back from real bad injuries. I had a young bitch cut through her tendons had all the right rest and all of that but after a night/day out she'd be sore for 3 or 4 days after so I give her too a family friend who doesn't work them it was real hard but sometimes it needs to be done it's not fair on the dog to be lame after every few runs imo atb mate might just need moretime off