Woke up this morning to find one of my buttons dead, and the other one very weak. I have no clue what happened to them, they were fine yesterday, i even heard them chirping last night, like nothing was wrong, so i really don't get it. i give them food and fresh water every morning. so now i have this weak little bird, and i have no clue what to do to try to make her better. i don't want her to die! any suggestions?