Guppy is sick? PLEASE READ CARFULLY?

look at your fish for white spots if you see any then she is stressed by that and this is a common disease called ich or ick. and will attack other because of this reason. the same happens to me but with differnt fishes. you should add some medicine to your tank to cure ick if you see it on your fish. another reason your fish will be stress if lately you have removed his friends or other guppies. i dont belive that 10 sec memory for fish is even true. because i have thought my fish something which they still remember. anyway guppies will hide during when they are about to give birth and you sid you only had one fry last time. this is imposible. you have had more but either she ate them or they got stuck in the filter and died.