You can make a rabbit snare with steel wire about 20 gauge and some string. Take some of the wire and bend in a loop. Twist the end to hold the loop in place. Make a larger loop by the other end of wire from the smaller loop you just made. Make another loop the same way. Be sure to twist the ends to keep tight. Take a long piece of string and tie it to the middle lop you made. Test your loops by pulling the string. Make what adjustments needs to be made.