I stayed away from this thread as a bit close to home as a sheep owner and dog trainer.
Some comments are just ridiculous!
Farmers are not emotionally attached to their animals oooooookay then so it is fine for us to lose our livehood for the pleasure of someones badly trained dog
Dogs that chase sheep will not kill humans!
Dogs that chase sheep will always chase sheep and will always need to be on a lead near livestock
Dogs that do not chase sheep need to on a lead near livestock
Dogs that are dogs need to be on a lead near livestock
Basically ALL DOGS need to be ON A LEAD near SHEEP
Dogs that chase sheep can be trained Over a long time to be more responsive to their owner in situations with no livestock around but must always be on a lead near sheep
A lead is the way to prevent sheep being killed by dogs.
Ignorance of the owner may be the reason for dogs killing sheep but once the owner knows they just keep their dog on a lead. Although they are pretty thick if owners do not know that dogs will chase sheep and do pretty much anything to get to them.
On our land we have had dogs rip their stomachs open jumping over bard wire fences to get to sheep and have major injuries themselves as well as causing over 50% of the sheep to miscarry.
All dog owners must assume that all dogs will chase sheep not wait to see if they do.
Never ever own a pointer unless you are a bit mad, love training recall for many years without seeing any progress or are a fantastic experienced gundog trainer or want to put in a lot of work to have a reasonable civilised trained dog.
I have award winning sheep dogs however out of politeness I will always have my dogs on lead around livestock that is not mine (unless competing!)
I could give you many tales of owners with dogs and the reason they gave for their dog chasing our sheep!
The dog that ripped its stomach open was one such dog - the owners took us to the small claims court for injury to his dog - the case was laughed out of court and the judge happily explained to the man that his vet bill for £2000 did not touch the sides of the amount of money we lost due to the aborted lambs and dead sheep.
However his dog then got back into our fields the following year and did exactly the same thing to our sheep.... The dog had run over two 15 acre fields from the footpath to get to the sheep. This time he did have a bill to deal with.