I agree that people should ask but only since I got Xena. Before then I was one of those who wouldn't even think twice about it... She gets carsick and has allergies so when someone offers a treat I say "Oh, no thank you, she is allergic" and they are usually pretty surprised dogs even have allergies. So then they ask me about it and I tell them what I know, so maybe next time they will think to ask and make sure.I've never trained either of my dogs with treats and they are the best behaved dogs around. I have no problem with people asking but it isn't their decision to make. I personally think it's a bad practice anyway, for the same reasons people don't generally approve of you giving their kids treats.