Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to help teething pups [title] Provide your puppy with chew toys. [step] Chew toys help satisfy the puppy's urges. When new teeth are putting pressure on a puppy's gums, chewing is a natural reaction.

Ending1: Many puppies develop paws as they get older, making chewing an instant positive behavior. [substeps] To encourage chewing, place a small treat-such as peanut butter-between your puppy's gums. Ending2: Puppies play on these toys since chewing makes it easier for them to maintain proper dental hygiene. [substeps] Try toys that are designed specifically for eating. Ending3: Limit chewing to manageable chunks throughout the day. Don't feed your pup too often because chew toys will provide much more oral pain. Ending4: If you don't provide a chew toy, your puppy will look for something else to chew, including furniture, shoes and other things you value. [substeps] The best chew toys are made of sturdy materials.

Answer format: ending1/ending2/ending3/ending4