Please choose the correct ending to complete the given sentence: Work World: [header] How to care for a toy poodle [title] Choose a food formulated for your dog's age. [step] Depending on their age, dogs require different levels of protein, calories and other nutrients. There are different types of dog food formulated for puppies, adult dogs and senior dogs.

Ending1: [substeps] Because puppies are so small, it's best to buy a food that is designed specifically for puppies. A very small dog may not taste good when they're fed food meant for developing size due to larger dogs's digestive systems. Ending2: [substeps] Puppies: puppies need higher levels of protein for their muscles, calories for growth, and calcium for healthy bones. If your toy poodle is a puppy under 12 months of age, feed it dog food that is specially designed for puppies. Ending3: Check the manufacturer's instructions and product description to see what is good for your dog. [title] Have an adult show you how to feed and care for your dog. Ending4: Depending on age, consult your veterinarian or look online for an appropriate formula that meets your dog's nutritional needs. [substeps] Dogs can be overweight or can suffer from certain medical conditions that should not be treated by dog food.

Answer format: ending1/ending2/ending3/ending4