one of my 6 chick had pasty butt and i have been clean it like every one says and puting oil on it. it has been eating but is not showing growth like the others. her vent is pink and i have cofined her from the others. she is not as active as the others and i am scared she is not going to make it. i am going to try feeding her yougrt and crumble with yolk mixed in. is there anything else i should do or is it too late .thanks PEACE and LOVE JOSE she is 1 week old and she is in a wooden box with pine shavings. the temp is 90* F, non medicated feed. she is chirpping a lot when i separate her from the others. her poop is mustardy brown and is sticking to her vent but looked normel .she is pecking at her back side .