You do not have a fractured splint bone. They are serious, cause severe lameness and the broken end of the splint bone needs to be surgically removed to get soundness back.
Splints can be easily removed. Before I tell you how to take it off with no Vet or no invasive procedure, I want to see a photo of her front legs showing her knees to her hooves. I've taken off dozens of them off -- some as big as a small hen's egg, but, I want to see it first. Also, how old is she?