Some contain chemicals, which can be highly toxic to pets so be sure to read the label. Best to keep this high and out of reach of all four legged friends. This is a sweet treat for you and I, but chocolate is poison to cats and dogs. Chocolate contains theobromine, which can not be digested by their bodies and instead of being eliminated it builds in the pets system. There is no way of knowing you pet's threshold for this chemical, and size is not an issue in this matter.
Some dogs can become deathly ill after consuming only a half an ounce of chocolate.
Some may find giving their pets alcohol amusing, however may times this turns into a quick run to the vet at an emergency rate because of alcohol poisoning. Reactions to alcohol can be extremely violent. There is no way of knowing what your pet's tolerance is, so your safest bet is not to give them any. I hope you and yours will all have a safe and happy holiday and a prosperous New Year. Planning ahead for your pet can be worth a large vet bill and a holiday spent at the vet instead of with friends and loved ones.