I have just been outside to my flock and my white silkie pullet is making a strange humming noise, sort of in time with her breathing. It isnt really a wheezing sound just a bird sound i guess. I am unsure of her age as we bought her from a market, however she must be near to 20 weeks old. Does any one know what this could mean? she's not acting herself, off her food and keeps sitting down, until i go to pick her up and then she goes mad (never really been a fan of being held). Any help would be great as i dont want her to suffer if she is sick. Thankyou!