MCSs of rats in colony house. CSs and MCSs of roof rat, of roof rat and Norway rat in separate enclosures. CS, MCS and PAN of empty colony house. MCSs and CS of rats in metal pen. MCSs of rats around a cage set against a wall, one of them being caught. CSs of rat sniffing piece of cheese on trap. CSs to MCS of rat trapped, trap upside down. Shot of rat approaching trap, running away. MCSs of dead trapped rat, other rat sniffing.