While they may not be part of a chicken’s natural diet, there is nothing toxic about cucumbers that make them unsuitable for chickens to eat. Although cucumbers may upset the stomach of your chickens, they are not inherently dangerous or toxic at all.

If you do decide to feed your chickens cucumbers, it is highly recommended that you cut them up into small pieces so they will have no problems digesting it. You should also take the time to thoroughly wash your cucumbers off because there could still be pesticides left on from the growing process, making them dangerous for both humans and animals.