The trench soldier of World War I had to cope with millions of rats. The omnipresent rats were attracted by the human waste of war – not simply sewage waste but also the bodies of men long forgotten who had been buried in the trenches and often reappeared after heavy rain or shelling. Two or three rats would always be found on a dead body. They usually went for the eyes first and then they burrowed their way right into the corpse. Trench conditions were ideal for rats.
Some of these rats grew extremely large. It was not uncommon for rats to start gnawing on the bodies of wounded men who couldn’t defend themselves. Many troops were awakened by rats crawling across their faces. These rats became very bold and would attempt to take food from the pockets of sleeping men.
Disgusted and often feeling a horror of their presence, soldiers would devise various means of dealing with the rat problem. Although shooting at rats was strictly prohibited – it being regarded as a pointless waste of ammunition – many soldiers nevertheless took pot shots at nearby rats in this manner. Attacking rats with bayonets was also common.
But efforts to eliminate them proved futile. A single rat couple could produce up to 900 offspring a year. Cats and terriers were kept by soldiers in the frontline trenches to help free them of disease-carrying rats. The terriers were actually very effective in killing rats.
There is difference between a cat and a terrier when it comes to rodent control. When it comes to cats, even the best mousers only go after one at a time, and they often pause to eat. Generally it can take them days/weeks to deal with an infestation because of this. With a good terrier, they will take care of your rat issues in a matter of hours. They don’t stop to eat. They kill, then move on immediately to the next creature. They don’t play with their prey like cats do. They kill immediately. One terrier will also be much harder for rats to overwhelm as well. They are bigger and stronger than a cat, and their jaws are much bigger. That’s what they were bred, to kill rats.