Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to care for a pet duck [title] Feed ducklings and adolescent ducks a diet that is 18-20% protein. [step] Young ducks grow quickly, and as a result, they need food that has a lot of protein and is high in calories. For the first 3 weeks of life, feed them a starter diet that is 18-20% protein and consists of small pellets (about 1/8 ").

Ending1: [substeps] Adult ducks should be fed 10-15% protein. Younger ducks should be fed 12-16% protein. Ending2: [substeps] Do not overfeed the ducks. Just give them a half-gallon (6 liters) bucket of prepared pellets at daily feedings. Ending3: [substeps] Adult ducks, including young ducks, will often require more than one starter diet. In contrast, ducks should only eat one starter diet, and each starter diet will also require it. Ending4: [substeps] Duck food can be bought at your local pet store. Some reputable manufacturers of duck food are purina, mazuri, or gunter.

Answer format: ending1/ending2/ending3/ending4