Is chocolate truely harmful to a dog? mine ate about 30 mini chocolate bars and nothing bad happened this was a couple days ago he ate them wrappers and all. and seems fine. it is the first time hes done it that I know of he is 5 yrs old 55 pds yellow lab grayhound mix. any thoughts or stories on chocolate and doggies for future refrence. what to do what are any bad signs/warning signs??...stuff like that. thanks