wow, i totally didnt know grapes were poisonous to dogs. My dog LOVES them, he literally begs for them all the time! he plays with them, then sucks them before eating them, its very cute but now im concerned. If they are bad for hm, what are the symptoms and why would he beg for them? im a bit dubious to be honest. Mind you, he is HUGE (he's an irish wolfhound) so maybe they dont effect him as much. Also, he has eaten a lot of chocolate in his life (he always finds the advent calenders or presents under the tree at xmas) and now we are aware of the chocolate issue we hide it but again, he has never had an adverse reaction (although obviously, he may feel awful after for all i know).