Now being very rural here, we get 'bothered' with rats pretty frequently. They burrow into the polytunnel and eat the tomatoes on the lower leaves and also help themselves to the chicken feed, not to mention that they've had two of my chicks. So Michael makes his own secret feeders with attractive rat food in them.
The key with rat bait, is to keep it in place all year round, so the rats get used to it being there and to change your brand each time you run out, so that they don't get immune to the stuff.
Get hold of a length of 110mm plastic drainage pipe
Cut off a piece 1 & 1/2 metres long, no shorter as the bait will come out, and then birds and chickens will be able to eat it.
Off that 1 & 1/2 metre piece cut off approximately 150mm to make the cover.
On the longer piece, cut out a slot in the middle, in which you will pour the feed. Make it smaller than the small cut piece, so that the cover will completely cover the hole.
Take the smaller cut piece and cut all the way down the long side, on both sides, but not exactly opposite each other, so that when you put in on the long piece it forms a secure clip.
Your rat bait feeder is now ready for use.
Keep it topped up at all times and clear up any spillage, so that garden birds and chickens cannot get near the poisoned corn.
As you can see above, Michael has secured the feeder with two stakes hammered into the ground, up against the fence. Don't forget to replace the lid!