[header] How to hatch chicken eggs [title] Find out where to source fertile eggs. [step] Fertile eggs must be obtained from hatcheries or poultry farms which have roosters in their flock, if you do not breed your own chickens. You may be able to buy fresh farm eggs from someone who sells their extras. 
Be sure to check with potential suppliers well in advance, to ensure they have the correct breed and number of eggs in stock. Your county extension agent or extension poultry specialist may be able to suggest a source.