I don't think so because my dog knocked over a box and ate them all lol. and he was fine.
NO
The cavities can.
sugar is not good for dogs don't feed that kind of food to your dog
No, but it may give him a sweet tooth.
if your dog had a couple its okay just don't feed them to him all the time i would recommend dog food =P
Sugar Shortbread cookies can only hurt dogs if they take about 15. So if your dog just knocked over an entire platter of sugar shortbread cookies, it might be a good idea to call the vet. The only thing that could hurt your dog is the sugar because too much could cause high blood pressure (That's true even for dogs) and several human contagious diseases.\
Not if you are just giving the dog one now and again.
whether or not this particular treat will actually hurt your dog, you should try and opt for treats made specifically for dogs and keep "people" food to a minimum. A dog's digestive system is not as advanced as ours and their bodies have a harder time breaking it down.