There is a very big difference between animals reared on a traditional farm with a caring farmer and meat produced on a high volume farm which is more like a factory. I've spent time around both and I only buy meat which I know has come from good, local farms.
I've seen what a domestic dog can do, I saw an Irish wolf hound attack a two day old miniature pony foal. It went straight for the throat. Fortunately the stallion kicked the dog and it ran off before it killed the foal but it went on to kill two goats before a farmer shot it. The dogs owner paid for the horses vet fees and the dead goats under threat of prosecution.