The following list are nutritional items that could kill or injure your Collie:
CHOCOLATE (The darker the chocolate, the more deadly)
RAISINS
GRAPES
MACADAMIA NUTS
COOKED BONES
LARGER AMOUNTS OF AVOCADO, ONION & GARLIC
ARTIFICIAL SWEETENERS (Sugar free gum, snacks, drinks sweetened with Nutrisweet, Aspartane, etc are killing pets daily)
YOUR PRESCRIPTONS
YOUR OVER THE COUNTER PAIN MEDS (Plain aspirin being the exception)
RAWHIDE (Pressed or chews - none)
FEBREEZE (Or Glade Plug-ins, etc-means Febreeze Pet Variety, also)
SUGAR, YEAST, DOUGH
GRAINS (including bread, rice & pasta)
WILD CAUGHT SALMON
CHINESE ANYTHING
PLASTIC ANYTHING, INCL SNACK BAGS, DITTO FOR FOIL
PENNIES CAUSE ZINC TOXICITY & DEATH
SAGO PALMS ARE TOXIC, AS ARE OLEANDERS & AZALEAS
EXCESS WATER WHEN OVERHEATED
NEVER FEED OVERHEATED DOGS
NEVER FEED DOGS ON WELFARE (You work for your food, they should, also)
This list will probably always be a work in progress. Do you have anything to add?