inkbot,

Those warnings about things dogs should stay away from stem mostly from their ability to eat much more by body weight percentage than humans can.  Wolves are supposed to be able to eat a week's worth in one sitting.  Thus if there is something slightly toxic in their food and they are allowed to eat as much as they want they have a good chance of poisoning themselves. Same goes for cyanide in fruit pits; we'd get full before we ate enough pits to kill ourselves, but a dog can poison themselves just fine.

Back in college my dog got into my roommate's stash and ate 2 Pounds of chocolate in a sitting.  She didn't feel so good but was otherwise fine.  If she was a four pound chihuahua it might be a different story, but she was a 90lb Malamute. Dogs can of course have allergies, that's a different story.

Anyway we've got a flea problem and the poisons are scary and not very effective.  I'll post my results.