Why You Don't Want to Buy Organic Eggs at the Grocery Store High Intelligence Sperm and Egg Donor Prices Rising. A recent ad quoted in this article offered 15 thousand dollars for a Stanford sperm donor who matched the desired. Candle an egg to look inside for embryonic development. If a you or a hen has been incubating an egg for a few days, you can candle an egg to see if it is fertile or not. Egg candling can be a most addictive experience. Years ago, when I first started home incubation, egg candling would begin on the third day, and then happened again. Photo Credit crash1965/iStock/Getty Images; You May Also Like. How Do I Know If My Chicken Egg Has Been Fertilized? Quitters are eggs that were fertilized. Hatching Egg A Hatching Egg is no ordinary bird egg; a hatching egg is an egg that has been fertilised during the mating process of the male and female bird. Eggs are laid by female animals of many different species, including birds, reptiles, amphibians, and fish, and have been eaten by humans for thousands of years. Bird. Social behaviour. Chickens are gregarious birds and live together in flocks. They have a communal approach to the incubation of eggs and raising of young. Embryology: The 21-day Chick Lifecycle. How does an egg develop from the time it is laid to the time it hatches? Come explore with us the fascinating 21-day. Zoologist Frank Indiviglio discusses breeding lovebirds in captivity on That Avian Blog.