coffee
tea
cat nip
rhubarb
garlic
onions/leeks
brown chocolate * white chocolate is safe so are butterscotch chips*
raw lima beans *frozen are safe*
seeds/pits/stones
Branches or leaves or flowers from stone fruit trees like peach, cherry nectarines...
Toxic ^ Because cat nip is toxic, some believe all mint is toxic.
grapes/raisins are debatable, some think they are safe, others think they are toxic, nothing has been scientifically proven yet so it comes down to personal choice.
as mentioned corn is fine in moderation.
Avocados are high in fat should be fed in moderation
no beef or pork very high in fat hard to digest
no butter/oil or seasonings when cooking meat, steam, poach, bake or broil is preferred cooking methods that don't require added fats.
limit citrusy foods like lemon, oranges, pineapple they can cause diarrhea if fed to much to often.
No canned fruits or veg there is to much sodium and preservatives. with the exception of canned pumpkin puree not the pie filling. They can have canned pumpkin and it can help with diarrhea.
Nuts in moderation also high in fat