This movie has very little to do with Vampires, or blood, or any real evil. The dog talks and has to avoid sunlight. Oh, and instead of drinking blood, he's into red Jello, but since this was made in Cananda, they call it "jelly". Sure the acting is awful but it's meant to be. The whole movie is slap stick and campy.
There's a sad boy who lost his Dad to illness, starting over in a new school. There's a neighborhood love interest who's nerdy but trying to keep in good graces with the "cool girls" that have allowed her to hang with them. Both kids are challenged to stand up to the mean kids, learn to be true to themselves, and do what they are good at.
The most raucous slapstick is reserved for the school's unscrupulous principal, and the (out of left field) goons that try to catch the dog throughout the movie and are foiled by the dog. They always get what's coming to them. It's just a fun little movie to watch with your kid. We enjoyed it.