Its funny how wounds don't always bleed when you expect. I had a Red Cloud Kelpie in Darwin years ago who used to roam the neighbourhood and as usual trotted in the front door soundlessly and put his paws up on my chest as I was lying on the couch watching TV. I aimlessly gave him a pat and then felt something odd near his neck, looked down and he had half an aluminium hunting arrow stuck through his neck with the fletching embeded inside. On examination someone had shot him from above and the flat razor broadhead and cut cleanly half way through his leather collar and gone through the side of his neck. The arrow had obviously hit the concrete path or similar beneath him and had snapped off the metal shaft. No blood no whimpers, freaked me out a little. Vet removed it that night under anaesthetic without incident and he went on for many more years riding bikes and sidecars.