History
The Venom symbiote somehow found its way in a pet shop, where it bonded with a dog that resided there. While there, the symbiote spawned several offspring, Lasher, Scream, Agony, Phage and Riot, that also bonded to animals residing in the pet shop and tried to attack their parent, but the symbiote evaded them and escaped the pet shop, finding its way into the home of a boy that wanted to buy the dog. As the dog fell asleep with the boy, Agent Venom found it, and presumably recruited it to fight against Carnage.[1]