[noidi]

Thanks, I didn't think about the viewpoint of "the sheep are going to be herded anyway, it might as well be my dog that has a bit of fun doing it".

I don't think the problem is imaginary, though. I still think it's schizophrenic to cause harm (in this case stress) to one kind of animal not out of necessity, but to bring happiness to another kind of animal -- even if the amount of harm is relatively minor compared to what could have been done. I have nothing against empathizing with dogs and trying to bring them happiness. On the contrary, I think it's illogical to restrict this attitude to dogs instead of extending it to all sentient beings, including sheep.