How can I make an Automatic egg harvester in Minecraft?

Solution 1:

I've always held water containing the chickens up with signs, so there can be air below it. Then place another stream of water below this to carry the eggs to wherever you want them.


C C C   <-chickens
WWWWW   <-chicken pool water
-----   <-signs
        <-air
WWWWWWWWWWWWWWWW <-collection stream

This should allow the chickens to float, but the eggs will sink into the collection stream. Let me know if this works out, haven't done this in several updates.

Solution 2:

I have used the following approach, which requires no signs, and only one water source per "slice". This is a cross sectional view (or a slice), you can repeat this pattern as many times as you want.

DC C CD         <-chickens
DWFFFFD         <-chicken pool water
DDDDDFDD        
DDDDDFFFFFFF    <-collection Stream 
DDDDDDDDDDDDD   <- Collection point on top of last D in this diagram
Legend:
D -> dirt
C -> Chicken 
W -> Water Source
F -> Flowing Water

Solution 3:

In Minecraft 1.5.1 you can use the new equipments to collect eggs easier,

Legend:
A=Chicken
B=Hopper
C=Chest


A A A
B B B
(where the hopper faces)
C C C

So when Chickens lays eggs the hopper collects it, then transfers it into the chest.

Solution 4:

Simple,

XCCC X X
XWFFFFFFXXXX
XXXXXXXF   X
XXXXXXXFFFFFFF
XXXXXXXXXXXXXXX

Legend:

W = Water
X = Any Solid Block
F = The Flowing Water
C = Chicken

Chickens will automatically try to float. Rarely though, a chicken will miss a beat an fall under block such as ice. Adding an air hole will make them come right back up. Because it is still possible for it to fall under again, another airhole is crucial. If you have a chicken SPAWNER then you can seal off all airholes, and make sure that one block is a GRASS block. This will make them spawn and be pushed underwater through the tube and drowned. You will also have to greatly extend the drop. The final drop collector should be no more then seven blocks long.

Things to know:

Chickens can fit in 1x1 spaces.
Water flows seven blocks until it stops, or drops one block.
Water cannot flow on itself, which means if water is flowing, it will not flow OVER another block of water.
Chickens will not be killed by fall damage as they float just before landing.
Chickens can be spawned in the nether.
Water will evaporate in the nether.
Chickens drop eggs while alive, and feathers and raw chicken when killed.
Chickens drop cooked chicken when kill by fire.
Chickens drop 1-3 experience ONLY if you deal at least one damage to them.
Chickens have the same amount of breath that you have.
Chickens will only spawn on grass in well lit areas.
Chickens will only SPAWN on the first time you create a world, or with spawners.
Chickens will no longer despawn, nor will any other mob.
To breed a chicken, get two chickens, and give both of them one wheat.
A chicken egg will not spawn an adult chicken, but a baby chicken.
Baby chickens grow to adults after about twenty minutes.

Solution 5:

Try putting a hopper on the bottom of the lake with a chest below(try to leave a distance of a block between those two,I don't remember exactly if you need the distance. Anyway the hopper will take the eggs and will put them into the chest below. Otherwise,if you haven't put the chest,the hopper will fill up faster and you will need to go take the eggs more often. I have other suggestion for your chicken house:knowing that items slide on stairs,you can put chickens to stay on some stairs that lead(downwards) to a hopper.