Please choose the correct ending to complete the given sentence: Pets and Animals: [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.

Ending1: If injected for one day before the chicken's 11th day of incubation, the incubation period is 3 days. That means that you can inject the eggs as soon as you take your baby back to the breast on your evening shift. Ending2: The injection will most likely take place at least a couple of days before the baby bird's 11th day. [title] Avoid injecting blood into the chicken before this time. Ending3: [substeps] Do not use chicks before dawn if the incubation period for a given chicken was more than 4 days. [title] Take out the skin just below the breast. Ending4: [title] Sterilize the egg and needle. [step] Sterilize the outside of the egg and the hypodermic needles.

Answer format: ending1/ending2/ending3/ending4