How do dogs react to chocolate milk?

Milk, period, contains a sugar called “ lactose” that dogs cannot digest. If they drink very much it can cause gas, cramping or diarrhea. read more

Dogs have to eat a pretty good amount of chocolate to get sick, so a small amount of chocolate milk probably won't cause much harm. But don't give chocolate milk or plain milk as part of a diet/treat because it's simply not good for them. read more

Even a little bit of chocolate can make your dog ill. Dark chocolates, baking chocolate, and dry cocoa powder are more dangerous than white or milk chocolate. But 1 ounce of milk chocolate per pound of body weight could still be deadly. read more

The same as plain chocolate would react - it is toxic and it can and will kill your dog. Do not feed anything with the ingredient chocolate in it to your dog. From: Chocolate Poisoning in Dogs read more