While it takes a lot of chocolate to make a Pyr-sized dog sick, the plastic candy wrappers can cause discomfort and even intestinal blockage. While we're on the subject of chocolate, remember that chocolate contains an element, called theobromine, that is toxic to dogs. Larger quantities of chocolate can poison or even kill a medium or large dog. Dark and unsweetened baking chocolates are especially dangerous. So save the chocolate treats for yourself and guests, out of the dogs' reach.
Thanksgiving brings the danger of too much fat, poultry bones and a surfeit of leftovers.
If you celebrate Chanukah, or use candles for any of the holidays, be sure they are up high where neither children nor dogs can accidentally knock them over. Ingested even accidentally, these can cause intestinal damage leading to death. The white trim on the lower branches is probably Pyr hair. This will cut off the electricity to the plug if the string gets grounded - in the mouth of a pup, for example. For a small investment, it can prevent electrocution, injury and even death.