It was dubbed the 'Ratweiler'. Rats become sexually active at 12 weeks old and breed like fury. As many as one in 20 properties in Britain is infested with rats. I'll be right back. Gotta see a man about a mouse.
Commonest rat is the brown rat.
Its black cousin, blamed for spreading the plague, is now rare. I've seen pet rats that were bred black as well as blonde. They have to file them down by gnawing rocks. Well, you should see my dental bill. They can float for 72 hours in drains while waiting for food.