(1) But young Pickles turned out to be an excellent ratter and was a favourite amongst our neighbours.(2) You should keep in mind the Carin was bred to be a ratter .(3) But when given a chance the Airedale can still be an expert ratter and can also be trained to the gun.(4) Its original purpose was as a ratter , working very hard to to remove rodents from places such as kitchens and stables.(5) Long-tailed weasels are good mousers and ratters , so farmers do not mind having weasels around their farms because they eliminate these pests.