Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for your chihuahua puppy [title] Feed your puppy a healthy food. [step] Like other puppies, chihuahuas need nutritious diets to keep them healthy. They do not need to be fed a specific diet but you should ask your veterinarian for brand recommendations.

Ending1: [substeps] Make sure to give your dog low-calorie dog food. The best quality dog food will come from the centers for disease control and prevention (cdc). Ending2: [substeps] Bars should be formulated in a low protein the most recommended type. Puppy food made specifically for dogs should have 1/8 ounce of quality bar protein per serving. Ending3: [substeps] Like other small dogs, chihuahuas are at risk of developing heart and kidney problems if they are fed a diet high in salt. Look a dog food that is low in salt to help avoid this issue. Ending4: [substeps] A well-balanced dog diet has two basic components: high fiber, low fat, and low level of protein. A dog's diet should always be low in protein.

Answer format: ending1/ending2/ending3/ending4