Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to give cats nutritional supplements [title] Assess your cat's health. [step] If you are considering giving your cat nutritional supplements, it is important for you to understand your cat's overall health. This assessment should be done by a veterinarian.

Ending1: A veterinarian will focus on your cat's diabetes, toxicity, and stress level. You should also weigh your cat's medical history to determine if it is overweight or if it is gaining weight. Ending2: Having an overall assessment will allow you to make decisions about what supplements the cat does, and does not, need. [substeps] A good time to get a thorough understanding of your cat's overall health is during their annual veterinary exam. Ending3: You should also ask your vet any questions you have about your cat's health, as well as their medical history and temperament. [substeps] If your vet is skeptical about your cat's nutritional or behavioral health, take this as a set of questions. Ending4: Talk to the veterinarian before deciding to add your cat to your diet and ensure your cat is growing. If your cat is overweight, your vet may recommend taking extra vitamin d.

Answer format: ending1/ending2/ending3/ending4