Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to hatch a mallard duck egg [title] Look for an incubator with a fan. [step] Using an incubator will ensure the egg stays at the right temperature for hatching. You can get a small incubator for eggs with a fan at your local pet store or online.

Ending1: You can also use a small blanket or cover at your local animal shelter. [substeps] Choose a egg with an opening that is approximately 12 inches (30 cm) wide and two inches (5 cm) deep. Ending2: Checking for a incubator with a fan will make it easier to separate the eggs from the egg tray and put them in the refrigerator until you are ready to hatch them. [substeps] To re-hatch your duck duck eggs, raise the fan and close all the windows and doors to your home. Ending3: [substeps] The incubator should also come with a wet bulb thermometer to allow you to monitor the relative humidity. You can sometimes find used incubators online for a lower price. Ending4: [substeps] If you cannot find a ceiling fan, you can use your wind blower. If your house has a fan, you should also try out your hand at building your own after some searching.

Answer format: ending1/ending2/ending3/ending4