I???ve expanded the list. Am I still missing anything? If you think of something not on this list, please post it in the comments section and I???ll add it.

Alcohol
Apricots
Avocados
Bones from fish or meat
Bread dough
Caffeine
Caffeinated drinks (coffee, tea, soda, ect.)
Cat food
Cherries
Chocolate
Citrus oil extracts (also known as limonene or linalool)
Currants
Garbage
Garlic
Guacamole (contains avocados)
Grapes
Hops (a type of flower cluster, also called seed cones)
Iron vitamin supplements for humans (and other human supplements containing iron)
Onions
Raisins
Raw fish
Macadamia nuts
Milk and dairy products
Moldy or spoiled food
Mushrooms
Peaches
Pears
Persimmons (a type of fruit)
Pits from apricots, avocados, peaches, and plums
Raw eggs
Raw fish
Raw meat
Rhubarb leaves
Salt
String (so much for just foods)
Soda (caffeine)
Sugarless candy (commonly contain Xylitol)
Sugary foods
Table scraps (large amounts)
Tea (if caffeinated)
Tobacco
Xylitol (an artificial sweetener)
Yeast dough