A friend's dog was so so ill after they went to relatives for Christmas and the dog got hold of foiled wrapped chocolate decorations from the tree. I would say to anyone to be careful of this (easy not to think about it if you don't have a pet yourself) and to adhere to the other excellent advice above
Richard Osman and his House of Games
Wedding Present Dinner Service.
Sudden pain in back of leg behind knee
My daughter is lying about me and editing me out of her life.

Also ribbon or string off the parcels. Also watch dogs with alcohol if you are leaving glasses around, dogs have been known to be quite poorly from imbibing what they shouldn't. And do watch turkey and chicken bones, cooked bones can be a killer by perforating the gut. Apart from that we just love to have them with us and enjoying the day 

