Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to raise ducks [title] Plan ahead of time. [step] Duck eggs usually take 28 days to hatch, but some breeds take as long as 35 days. You need to make sure that your incubator is prepared in advance before you purchase duck eggs and attempt to hatch them.

Ending1: Depending on the breed of duck you breed, you should plan ahead of time, especially if the family has an average number of geese. [substeps] For instance, if you have an average number of geese, you should plan on using 21 eggs and a pound of geese. Ending2: [substeps] You can find duck eggs at most dairy supply stores or online, too. Unless the manufacturer states otherwise, this is not the case. Ending3: [substeps] Ducks need at least 14 days to hatch any egg you find on the market. Any kind of egg, even if the crust doesn't be intact, will not hatch. Ending4: [substeps] Duck eggs are larger than chicken eggs, so many chicken egg incubators will not accommodate duck eggs. Make sure that the tray used in the incubator is large enough.

Answer format: ending1/ending2/ending3/ending4