Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to feed chihuahua dogs [title] Make meat the primary ingredient. [step] Making your chihuahua's food yourself is the best way to ensure they are getting food that is free of chemical preservatives, fillers, coloring, and animal by-products. Meat should be the most prominent ingredient in your chihuahua's food.

Ending1: It should be been added gradually throughout the day until it reaches a level that your dog likes. [substeps] The amount of meat varies between dogs. Ending2: Instead of using ingredients that are actually animal byproducts, add natural ingredients that will help feed your dog. [substeps] Animal byproducts are cooked ingredients like soy, cottage cheese, and whole grain flour. Ending3: [substeps] The best meats to include are lean ones like chicken and hamburger, as well as fish. You can also include organs like liver, kidney, and brain. Ending4: [substeps] Good examples of good ingredients to make meat are fish, chicken, and peanut butter. You can also make whole grain dog food if you like the texture of the cooked meat.

Answer format: ending1/ending2/ending3/ending4