Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for an overweight cat [title] Take your cat to the veterinarian. [step] The principles of weight loss in cats are simple-eating less and exercising more. To help your cat reach her ideal body weight, you'll need a plan to put these principles into practice.

Ending1: The first thing to do is to provide a baseline of the amount of food your cat needs to lose weight. This will be the ratio of food to water. Ending2: First, get veterinary advice and take her to the vet. If you've recently changed your lifestyle, the vet might be able to give you concrete advice or help you sort things out. Ending3: Your veterinarian can help you develop this plan, but he or she will need to examine your cat first. [substeps] Your veterinarian can determine if there are any underlying health conditions that could make it more difficult for your cat to lose weight. Ending4: [substeps] Only do this if the cat is very young. Kittens under the age of two years old will require around three to four weeks of care.

Answer format: ending1/ending2/ending3/ending4