Want to catch a rabbit and train our beagle what bait should i use? i want it alive.

do you know how to build a box trap? Otherwise you can buy them.I catch a bunch of rabbits every winter. I just stick an apple core inside. This winter I have been using some dried out carrots that I have, and I've caught a few. It doesn't really matter what you use for bait, as long as its some kind of produce. Rabbits are hungry now with the snow on the ground.

i have a box trap.thanks