If it's commercially made chocolate, they'd have to eat a lot to get sick. If it's 'real' chocolate, a little amount can be sufficient to really make them sick. Commercial chocolate is a lot of fake stuff.
Attack isn't the only part of dog parks I dislike. I think they are dirty and a pet owner doesn't know if the other dogs are being well taken care of and vetted. My vet agrees and went a step further to say that highway rest stops were one of the worst places for disease.
Glad to hear your mom did well in sugery. Hopefully your step-father will do better now that the surgery stress is over. It's a shame his own children don't care! That puts a lot on you but he's lucky you guys care. Hang in there!!!
That is a happy ending! My SIL's boxer ran out the door one Christmas morning at the other SIL's house. We all watched in horror as she dashed into the street and ran INTO an car. She bounced off the passenger door, and seemed completely unphased!