Silkies and poo

I recently bought a black silkie chick. Her poo (regular poo-not the brown pudding poo) has a distinct odor from the rest of my other assorted teenage girls... ie, 2 EE, 2 RIR, 1 Cochin, 1 barred rock-their regular poo has absolutely no odor what so ever. Is this a characteristic of Silkes? She is quarantined right now as she is new and her area smells like a stinky aviary zoo. I am not happy about this. Any thoughts from any one? Do they need a special type of food? She is getting the medicated start and grow like the others. Thanks.