I would be furious! this was not a slight accident at all, your poor dog wasn't given the care you expected from the kennels, and yes their insurance company paid the vet's bill, but what about the distress both you and your dog suffered as a result of their neglect, surely you should received some form of compensation, I think you should seek some specialised advice, I would need to know that this could not happen to another dog in future at this kennels, it sounds as though the pens are too close together, hope he continues to recover well..............welsh