Should Chomper have any siblings?

Would it be too strange to give Chomper siblings in the future?  Do you even think his parents are still alive or do you think that they were killed by Red Claw, Screech, and Thud?   If Chomper had siblings, do you think they'd be friendly to Littlefoot & co, or someone that Littlefoot and the others would have to avoid whenever they visited Chomper?