First he's sour, then he's sweet. Much like a sour patch kid, Oscar is the definition of a rascal. The 13-pound, 7-year-old pup was surrendered to Pets Alive because he has one issue: He's a biter! While someone attempted to adopt Oscar recently, he just wasn't having it. So alas, this boy is back at the shelter, and we're working on training to determine his triggers. Given his selective attitude, Oscar is best suited for a dog-savvy home without children.