I don't know what physical condition your dog was in prior to the hunt, but if she wasn't in peak shape beforehand that might be something to look at. Dogs are pack animals and never want to show weakness in front of the rest of the pack (which mostly means humans these days) for fear of abandonment. Hunting dogs will push themselves way too hard even if they aren't ready for it just to show that they are still fit.
I don't know if that had anything to do with your dogs condition, but it is something I would consider if she could use more exercise. I don't know why, but I think sporting dogs thrive on Exertion and I refer to it as vitamin E for dogs.
