Hi, please can you help me. about 2 months ago i lost one of my hens she seemed to be under the weather and had a bit of a dirty bum but not a lot at tool. her wings were also down. About 3 weeks from that my lavender pekin cocokerel died. i did not have a clue of any illness again he had extremly small dirty bum. And know today i came back from school and found one of my hens laying on the ground she was still alive. i picked her up and she hadn't eaten she had no energy at all and her wing were down after 10 minutes of trying to get her to eat and drink she shook ( had some kind of fit ) and died! What is the problems with these? can you please help as i dont want to loose any of my bantams again. My birds had been fed on poultry spice and egg nuitrition powders. this was given many times after the first death.