Hey guys, Mr. Biggs will be 2 years old in 3 months. He never lost 2 of his baby teeth (the fang ones). Is it normal that one of them is loose now?

Eventhough he's almost 2 years old? When I try and wiggle it, it bleeds a tiny bit at the gums.. I don't think he's in any pain though, because he still eats his hard treats. Any help would be apreciated.