We had house rabbits through the winter as children circa 1970. They lived outside through the summer, but it was cold and nasty out there in the winter. For some reason they loved biting through live cables of stuff round the house, and I got several significant wallops off the mains checking for faulty cables. Including one very nasty experience with one hand earthed, the other hand found the exposed live. But I've lived to tell the tale.
Never did solve the riddle how a rabbit can bite through a live wire without apparent damage (to the rabbit) and not learn the error of its ways.
As Brian says, for some reason they seemed to find biting cables irresistible.
Hope your earth leakage trip is working…….
Best rgds Simon