[header] How to dye a baby chicken [title] Use chicks in their 11th to 14th day of incubation. [step] It is possible to inject eggs that have been incubated anywhere from 10 to 19 days, but the 11th to 14th period is ideal. Only one injection is necessary if done at this time. 
[title] Sterilize the egg and needle. [step] Sterilize the outside of the egg and the hypodermic needles.