Law of unintended consequences 


Once i was going out with a friend and we saw 2 dogs in the street we thought they looked hungry and thirsty so we went to the store bought water and food for them , then we went back to the place where we saw them and gave them food and water. After that the dogs started getting aggressive which was weird because we gave them food and food makes dogs happy not aggressive so we decided to walk away and live the bad and grumpy dogs.