Back out, Trap nerve, ect ect could be anything fellah, Get her to a bone man to get her checked over,
Has she had any stingers of a run/or a real hard night of late? Only reason i say that is my mates dog did have a real hard night one night and he went simialer screamed when he bent down for food or water, Real down, lethargic, just not the same dog, Spoke to that running dog vet from Stafford way and he knew what it was straight away and told him what too do and within a few days dog really picked up... So like i say get her check out by a decent bone man....