Turning and Candling


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Turning and Candling

  1. 1. Turning And Candling Www.RCVetS.com
  2. 2. • The eggs should be turned three times a day. Turning the eggs is best done by removing about a dozen from the center and rolling the rest of them toward the center. Place the palms of your hands on the eggs and roll them around until you are sure all have been turned, and then put the eggs taken from the center around the outer edge.
  3. 3. Use care in turning eggs to avoid shocks or jars that may rupture the blood vessels of the germ. Do not leave eggs standing on end. Keep them flat, pushing the pointed ends down a little with the hand. With a soft lead pencil, put a small "X" on one side of egg and "O" on the other side so you can be sure of turning the eggs
  4. 4. • Place turner on bottom of incubator with the motor side to the back of the incubator (rim of bottom with notches is the back). Slide turner as close as possible to the front rim of bottom of incubator. Be sure the turner sits flat on the wire floor.
  5. 5. • Use a serrated kitchen knife to cut out the notch in the corner by the motor. This will permit the electric cord from the motor to exit from the incubator. • Run the electric cord through the notch and press to the bottom of the notch.
  6. 6. Candling • What is Candling? • Candling is a way of checking the fertility of an egg and the development of the embryo, with the use of a light source in a darkened room. In a darkened room, carefully hold the egg up to the light to observe the contents of the egg.
  7. 7. Candling Results The embryo is located at the large end of the egg, where blood vessels will be present under the surface if the egg is fertile. The embryo appears as a dark spot which becomes larger as the incubation period continues.
  8. 8. • Fertile egg The egg will appear to have a black spot which as the embryo grows and incubation continues will grow larger until light will only pass through the air cell end of the egg. • Infertile egg Eggs appear clear.
  9. 9. Dead Embryo: If the egg was fertile but the embryo has died then you will see a blood ring around the yolk or possibly a dark spot dried to the inside of the shell depending on when the embryo stopped growing. Note that dark or brown shelled eggs are more difficult to candle than white or pale shelled eggs.
  10. 10. When To Candle • Candling can be done at any time, although day 8 onwards is usually when the embryo is more easily identified. • Day 3 of incubation (usually pale shelled eggs).
  11. 11. When To Candle • Day 5/6 of incubation (usually dark shelled eggs). • Between day 8 - 12 of incubation (embryo more easily identified). • 3 days prior to hatching.
  12. 12. How to candle • To candle, darken the room. Eggs can be out of the incubator (or away from a broody hen) for up to 20-30 minutes before starting to cool down inside, so don't rush. You can GENTLY roll the egg on the candler to get the best view.
  13. 13. How to candle • Out of the 14 eggs in this batch, we removed nine by day 14 that were obviously not developing. There is a chance that a nondeveloping egg will explode in the 'bator, and that is messy and STINKY.
  14. 14. Stop Candling • One should not candle after day 16 or 17. The eggs are mostly chick (black mass) and air sac by then anyway, and they should be left alone for the last few days before hatching (no turning from day 18-hatch).
  15. 15. • Stop egg turning 2 or 3 days before hatch is due. Remove the rods. • When first egg pips, raise humidity to maximum this can be done by adding warm water to both pans • Keep the incubator lid on and don’t interfere! Humidity will rise rapidly when chicks emerge and condensation may form.
  16. 16. • When most eggs have hatched (12 to 48 hours) remove hatchlings to a brooder to dry out. • Do not open the incubator unless it's extremely necessary
  17. 17. • Eggs candling clear But showing blood or very small embryos on breaking. Incubator temperature too high. • Eggs stored below 40 or above 80° F. before setting.