RE: things that kill dogs--
"Grapes and raisins aren't the only people foods known to be dangerous to man's best friend. Chocolate and cocoa can prove deadly to them, as can onions and macadamia nuts."-- http://www.snopes.com/critters/crusader/raisins.asp http://www.snopes.com/critters/crusader/cocoamulch.asp--
"Cocoa beans contain the stimulants caffeine and theobromine. Dogs are highly sensitive to these chemicals, called methylxanthines. In dogs, low doses of methylxanthine can cause mild gastrointestinal upset (vomiting, diarrhea, and/or abdominal pain); higher doses can cause rapid heart rate, muscle tremors, seizures, and death.
Eaten by a 50-pound dog, about 2 ounces of cocoa bean mulch may cause gastrointestinal upset; about 4.5 ounces, increased heart rate; about 5.3 ounces, seizures; and over 9 ounces, death. (In contrast, a 50-pound dog can eat up to about 7.5 ounces of milk chocolate without gastrointestinal upset and up to about a pound of milk chocolate without increased heart rate.)"
these don't kill humans, so therefore vegan.