Candling Pics Progression Through Incubation Of Chicken Eggs

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  1. silkiechicken
    CANDLING PICS: Progression Through Incubation


    Thanks to ZooMummzy, I am doing a test run of my little plywood bator and her little rooster! And I'll be sharing pics! These images are all taken using a point and shoot Canon Powershot 710IS, and the light from an eagle tac set on high output. Photos are in real colors unless otherwise noted.

    Click thumbnails for larger image!

    The incubator:
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    It's got a clear top for hatch day viewing and two lightbulbs covered in foil because I was too cheap to buy ceramic heat lamps. The reason behind two bulbs is in case one light bulb burns out the incubator won't go cold. It has a salvaged computer fan and uses a salvaged GQF thermostat. There are about 8 layers of spar urethane coating the little beast so it's water tight. Started making it when I was about 13, so if I were to do it again, it would be much larger and have space planned for a fan/thermostat. [​IMG] Temperature is measured with a Fluke digital multimeter with thermometer attachment, and humidity is measured via wet/dry bulb methodology.



    0 hrs Note that with a bight enough light you can see though brown and green eggs easily. Shell thickness and egg size will impact image quality, so note these are bantam eggs.

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    This is a great example of a porous egg, not ideal for hatching.
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    28hrs Not much to see though the egg at this point. If you were to open the egg and look at it under a dissection microscope, you'd see that the head/neural fold has formed, and up to 4 pairs of somites. (Somites are mesodermal cells which migrate and give rise to tissues such as muscle, bone, and cartilage. Note the number on the egg, it serves as tracking and to know which side is "up" as I am hand turning 3x a day.
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    52 hrs If you look closely, you can see the start of the blood island in the middle of the egg. The heart is actively beating by this time and has started to turn; the heart starts out as a tube during development.
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    May be easier to see after photoshop, it's that darker ring on top of the yolk shadow
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    76 hrs At this point, limb buds have not only formed but are enlarging and the eye is beginning to become pigmented.
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    Some photo editing and you can really see the veins!
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    Schematic
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    100 hrs The limbs are now starting to look like limbs and the embryo starts to look like what a common person would say is an embryo.
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    Enhanced to see veins
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    Day5 On this day, the beak has just become viable and the chick's limb buds are no longer buds and instead will have identifiable digits! The black dot is the eye.
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    Edited to enhance veins
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    A day 3 or so quitter
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    Profile view and you can see the veins in my finger too.
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    Day6 It gets harder to take clear vein pics, as there is enough vascularization that it gets a bit washed out.
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    Enhanced image.
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    Embryo Movement Clip




    Day 7 If you were to open them up, you'd see little specks where future feathers would emerge!
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    Day 8
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    Day 9
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    Day 10
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    Day 11
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    Video



    Day 12
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    Day 13 If you opened them up, you'd see claws forming!
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    Day 14 It's so dark there is pretty much nothing really to see! Just a bit of space left
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    Day 15
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    Video


    Day 16 You can see toes in the second one!
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    Toes video

    Day 17
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    Day 18 Lock down!!!! Since there is plenty of space in the bator, I made little paper cups to put each egg in. Hopefully this will catch the majority of the hatch junk left over from popping out so clean up is a bit easier.
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    HATCH DAY Note, there is no plan to open the bator for the next 48 hours. The top is clear so all the action can be seen without compromising the hatch!
    Pips
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    First to hatch: About 14 hours after the first pip at 4am. Note the clean hatch and absence of any blood in the shell. It was ready!
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    Hatch Video

    Second to hatch: About 17 hours after the pip at 4am. Could have piped any time between 11pm and 4 am though. Another clean hatch.
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    Note the first vid is part of the zipping. The pip to zip can literally be hours to days, but usually, once it starts to zip and sets out to get out, the shifting and cracking process is about 20-30 mintues.
    Zipping

    This one gets to the point more.
    Hatching


    30 hours after the first pip, the hatch is now complete! This is about my average time to hatch. I've had some take even longer so there really is no rushing the little guys.
    There were 7 fertile eggs that made it to day 3. All 7 hatched on their own without opening the bator between day 18 though post hatch and fluff.

    Post hatch shell interior. Note that all the vessels are gone and it's just pink. Not a single drop of blood. The little blob in the bottom is the chick wastes from development; think of it as embryo poo.
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    And now the best part! The chicks!!!

    The chicks have learned how to drink from a hamster water bottle.
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    For more discussion on this page see the thread:
    https://www.backyardchickens.com/forum/viewtopic.php?id=261876


    Incubating & Hatching Eggs Forum Section

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Comments

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  1. crazyfeathers
    Great information, you did a really good job explaining everything. Thanks
  2. richicken
    great info. and pics. this page helps a lot,we are trying to hatch out some of our own chicks for the first time and we weren't sure what to look for,so thank you for the pics they helped us so much.
  3. gardenmist216
    I have eggs in my incubator right now and I keep reffering to your candling pictures to make sure that the eggs are on track. thanks or this so much
  4. monita
    thank you so much..... this really helped me determine how far along my eggs are. the surprise I got when I realized the eggs a friend gave me were already developing had me kind of worried. I didn't know how far along they were so didn't know when they would hatch. this helped so much..... thank you again for taking the time to provide this.
  5. dascountry
    I just candled my eggs at day 14 yesterday. Was a bit upset that they were black inside....SO very glad I found this thread, they look just like they are supose to.
  6. RingneckParrot
    Thanks so much for posting this excellent guide!! I have some fertile eggs under a broody right now.. i'm thinking when they are about 7 days old I should candle one.. would it disturb my broody hen?
  7. roncrna
    I still use this as a guide. What a great reference!
  8. tarachickgirl
    thank you this helped me alot with the photos
  9. BigKitty09
    great post!! we had the worst luck with our last batch under our broody hen. 2 of 9 hatched but she ended up smushing them :( we hope to be extra careful with the next batch!
  10. silkiechicken
    You can't tell if an egg is fertile when it is laid. You have to incubate it and see if it develops. If you have a young rooster mounting the hens though, your likly to have fertile eggs.

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