My dog ate chocolate covered strawberries? Help asap?

My dog is about 110 pounds and ate my mom's valentine's day present, or at least half of it. they were milk chocolate covered strawberries and he had about 4 or 5. I know milk chocolate isn't nearly as toxic as dark chocolate, but should I take him to the vet? He's had chocolate before and nothing happened. The total amount of chocolate he ingested was probably no more than 1 pound, since most of it was the strawberries. Advice? Is this an emergency?