Levels of theobromine in ChocolateConcentration of theobromine varies with the formulation of the chocolate
The theobromine in candies consisting of chocolate that is coated over some other substance - as in filled candies and chocolate coated dried fruits, etc will be more dilute than that in pure chocolate bars and solid chocolate candies.
Things like Oreos and other chocolate cookies, or chocolate ice cream, contain only a tiny bit of real chocolate. Candybars that are covered in chocolate have only slightly more. Hershey's kisses are milk chocolate, but a few aren't usually dangerous for larger dogs. Good chocolate bars and bittersweet chocolate are risky. I've been known to share my oreos and chocolate chip cookies now and then.
There is also some evidence that the effect (at least in some dogs) can be cumulative. While one incident may not be dangerous for your dog, letting them eat chocolate over time can lead to issues.
IF YOU HAVE ANY CONCERNS, CALL YOUR VET!!!! If your dog is acting strangely (very energetic, or listless, throwing up, breathing quickly, or pacing, or showing signs of pain), call immediately!
Toxic Amounts of Chocolate
Dog's Amount of Amount of Approx. Mg. Weight Milk Choc Unsweet. Choc Theobromine 5 lb. 4 oz. .5 oz. 200 10 lbs. 8 oz. 1.0 oz. 400 20 lbs. 1 lb. 2.5 oz. 900 30 lbs. 2 lbs. 3.25 oz. 1300 40 lbs. 2.5 lbs. 4.5 oz. 1800 50 lbs. 3 lbs. 5.5 oz. 2250 60 lbs. 4 lbs. 7.0 oz. 2700 70 lbs. 5 lbs. 8.5 oz. 3400
Dog's Amount of Amount of Approx. Mg. Weight Milk Choc Unsweet. Choc Theobromine 2.2 kg. 113.4 g. 14.1 g. 200 4.5 kg. 226.8 g. 28.3 g. 400 9.0 kg. 453.6 g. 70.8 g. 900 13.6 kg. 907.2 g. 92.1 g. 1300 18.0 kg. 1.134 kg. 127.5 g. 1800 22.6 kg. 1.360 kg. 156.0 g. 2250 27.2 kg. 1.814 kg. 198.4 g. 2700 31.7 kg. 2.268 kg. 240.9 g. 3400