A pug puppy is an excellent addition to any family because they are friendly, happy puppy. As with all puppies, they need to be taught the rules, but they are happy to learn and spend time with you.
Proper Socialization
All puppies need to be socialized to everything you don't want them to fear when they are older by the time they are 14 weeks old. Though pugs are known for their friendly, happy-go-lucky personalities, this is still important. Take them out to meet people of all ages and dogs. Make sure they are exposed to skateboards, delivery people, mailmen, gardeners, loud noises and everything else you can think of.
Pugs are very motivated by food, so bring yummy treats and praise and reward for everyone and everything they approach bravely. If they seem nervous, don't force it. Wait for them to approach the person or object and then reward when they do.
Separation Anxiety
Pugs love to be with their people, so it's important that they spend time away from you as a puppy so they learn how to adapt to that. Put your pug in his crate or quiet room a couple times a day for a nap when you are home. Don't respond to any crying. Let him out when he's quiet.
Leave him alone for short periods during the day as well if you don't work, so that he learns that when you leave, you will still come back.
Potty Training
Small dogs can be difficult to potty train because they have such small bladders that it's easy for them to have accidents if left unattended. Your pug puppy may need to relieve himself every hour, so make sure he has the opportunity.
Never leave your pug puppy unsupervised. Tether him to your belt loop or put him in his crate if you can't watch him. If you are going to be gone longer than an hour, put him in a small area with his bed and a potty pad.
Take him out every hour (or however long he can hold it.) If he goes, reward him with treats and praise. If he doesn't, put him in confinement for another 15 to 30 minutes. Repeat this as often as needed.
Chewing
Pugs love to chew, so they may begin to chew on your furniture and other items. To avoid this, never leave your dog unsupervised. Punishment after the fact is never effective because your dog doesn't associate the punishment with the behavior. Thus, you have to catch them in the act and redirect to an appropriate toy.
Teach a leave it command by holding a handful of treats. Give one and say "take it." Repeat a few times. Then, say "leave it" and close your fist. Leave it right by his nose but ignore all biting, licking, pawing and barking. When your dog calms down and looks up at you, praise and say "take it." Give the treat. Repeat until you can hold the treat in your flat palm and your pup still ignore it.
Move this to floor and use your shoe to cover the treat. Repeat until you can put a treat on the ground and your pug ignores it. Then, start practicing with any object that your pug likes to steal or chew: tables, people food, toilet paper, shoes, etc. Once you have practiced this for awhile, he will know what things to avoid. Just be sure to provide him with lots of appropriate chew toys.