pullet       
noun [ C ] uk/ˈpʊl.ɪt/ us/ˈpʊl.ɪt/
 (孵出不到一年的)小母鸡
a female chicken that is less than a year old
  I bought half a dozen hens and half a dozen pullets. 我买了六只母鸡和六只小母鸡。 
 The chemical was added to pullet feed as a preventative medicine for bacterial diseases. 这种化学药剂添加入小母鸡饲料中作为预防细菌性疾病的药物。 
 - More examples
 - From a nearby farm in Yorkshire, we can buy pullet eggs at £1 per dozen or large eggs at £1.60.
 - Noel owns and operates a pullet barn for 32,000 chickens.
 - New pullets will have the very valuable advantage of being placed on fresh land where there is little, if any, build-up of parasites and bacteria.