Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep cockatiels healthy while breeding [title] Select a quality commercial birdseed. [step] If you want to get your cockatiels healthy for breeding, a good diet is vital. Most cockatiels thrive on a healthy commercial birdseed.

Ending1: Avoid falconases using commercial seed, since there is a risk of disease. [substeps] An affordable commercial birdseed package will come with as much as 4 g of seed per bird. Ending2: Try to find a commercial that you have access to. [substeps] The starter feed of a commercial bird is not enough. Ending3: They're healthy and maintain weight appropriately. [substeps] When searching for commercial products, look for one that's free of alfalfa, grass, and other debris and that contains aalazole. Ending4: [substeps] You should go for bird seeds over pellets, as seeds tend to be more nutritious. Choose a brand with a good reputation and one that minimizes use of additives, pesticides, and preservatives.

Answer format: ending1/ending2/ending3/ending4