If you want to collect their eggs you put a fence around the fowl.
if you don't want to be eaten by a lion you put a fence around you so both ways you keep yourself and your chickens from the lion.
The lion is the "king of the jungle", well plains really as he is the strongest and most ferocious of the cats. He is only scared of the elephant.
FAIR USE NOTICE:
This site may at times contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner.
For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml