OK. We have a water butt. I use it for my plants and also to give water to my chickens. Today I went to get waterfor them and it was all foamy. Eventually (long story) I figured the water was contaminated. Looking in my neighbour's wheelie bin, I found an empty bottle of toilet cleaner (but not before I'd given some to chickens and given LOs grief for putting disinfectnt in the watering can) Someone has deliberately poisoned my water.