I'm sure it's just personal preference, but I've got 3 dogs. One of them will eat anything that's put in front of her, one eats most things without any fuss, and the third has had issues with eating a couple of things before. The only dog who will come near these biscuits is the one who eats anything - and she eats them after sniffing at them for a while. I could use these quite effectively to repel the other two. I had these biscuits in my pocket along with other snacks that usually get snapped up and disappear shortly after they leave my hand. The two who won't touch these biscuits didn't even touch their regular snacks after that. It's been a week since they were delivered, so I'll try for another week to see if I can get them to start eating them and update this review if it works. I'm wondering what I'll do with the 2nd pack if it doesn't.