I had problems with badgers and chickens some years ago, even though the chicken run was fenced with chicken wire. In the end I put up an electric fence (white tape as used for horses) about 8 inches off the ground and connected it to a battery fencer. This kept them away. I now have major problems with deer coming into the garden and I have had to put a fence (5 foot high) all round the vegetable area – last year they jumped over that, so I put electrified tape above the wire netting fence and that stopped them. In fact, you only need to actually electrify it for a few days, but leave the tape in place and that alone will put them off. In other words, you could borrow a battery fencer for a week or so,rather than buying one.