Just an excerpt from an article sent to me:
“Effective rat disposal means resorting to killing rats in the multitudes without having to deal with stinking bodies hidden in the nooks and crannies of your house.
The best way to take care of any infestation problem is to trap the rats, then dispose of them, but not only is that slow and tedious, but the possibility that the rats will fall for your trap is a bit small. The use of rodenticides is frowned upon in some communities, especially if used in places where food is prepared, and could also possibly be the cause of the spread of rat-related sicknesses, such as the bubonic plague – fleas and mites from rats carrying the diseases will transfer from the dead bodies to other organisms.
So that, again, leaves you with the traps. Available traps include glue traps, snap traps, and the tin can traps. Each of these traps work under the premise that the rat will starve itself to death.
Unfortunately, this isn’t always the case: some of these traps are rather easy to escape from, making the intent to kill ineffective at best. But that’s isn’t all there is: the toughest part about removing and killing them with traps is that rats initially tend to be very suspicious of new things, going out of their way to avoid so much as a rock on their usual path, so such things as glue traps and mousetraps will dutifully be avoided by the rats.
A slow process of elimination – but effective if it can be pulled off well enough – is to shoot the rats with guns (doesn’t matter if you use air guns, or real guns, although the latter would require licenses). It also makes getting rid of the body an easier task.
Some people prefer to use the combination of slow-acting rat poison and traps. You feed the rats with killing food, and wait for them to get caught in the traps. The poison makes them too weak to break free from even something as light as a glue trap, and in a couple of days – sometimes, in a couple of hours – you’ll have yourself a dead rat.”