Which proverb / expression is original? -- 爱及屋乌, 爱乌及屋, 爱屋及乌 In an ealier question (or thread) 爱、采 ( A trivalent verb takes 2 objects )  ...

3 variations/versions of a proverb or expression were mentioned :


爱及屋乌 == he loves her so much that he even loves the CROW perched on the roof of her house.  ( Note: 'crow' rather than 'bird' -- people don't have crows or ravens as pets, do they? ).
爱乌及屋  --- I think this means : (He) loves the pet bird so much that he even loves the cage. 
爱屋及乌


I think the original form is 爱及屋乌.

    Confucius would say: a true love (of a man) is trivalent; and
      has two objects: the woman he loves, and everything around her.


Which one is original?
http://www.zdic.net/c/1/3/5022.htm


  愛屋及烏
      因愛一個人連帶的也愛護停留在他屋上的烏鴉。語本尚書大傳．卷三．牧誓．大戰篇：「愛人者，兼其屋上之烏。」後比喻愛一個人也連帶的關愛與他有關的人或物。明．許自昌．水滸記．第八齣：「他們都是你舅舅的相識，你何無愛屋及烏情？」隋唐演義．第八十七回：「楊妃平日愛這雪衣女，雖是那鸚鵡可愛可喜，然亦因是安祿山所獻，有愛屋及烏之意。」亦作「屋上瞻烏」、「屋烏推愛」。


also: http://baike.baidu.com/view/10509.htm