Poison Barf--WARNING--this is gross--do not read if you have even a somewhat high opinion of me or a full stomach

Poison barf is something not to feed to dinner guests. I'll give you two rock-solid reasons why:

1) Even if they can get over the fact that you served them vomit, they still die and splash vomit on your table as their face falls into the bowl before them. It could be a plate, I suppose.

2) Even if they have a tolerance to whatever poison you laced the meal with, they throw it up again anyway and make even more mess and are not nourished by the dinner.

Disclaimer: Poison barf is perfectly fine to serve to guests who like eating barf and have built up a tolerance to the poison included. Old, decrepit dogs also are perfect candidates.