"Isn't chocolate poison to wolves?"

It was a genuine fear of wolf dad after becoming a werewolf. I mean, how embarrassing would that be... dropping dead after eating a bar of chocolate.

After finally caving in during one of his periods of great need for sweet munchies he found out the answer; just some mild intolerance, no damage that stays forever.

Verdict: worth the suffering.

Just don't bake him a chocolate cake for his birthday.