Please help!

Here are a few things you can do.

If your puppy has diarrhea, keep your eye on him to see how bad it is. If it is severe or if it doesn't stop after the first day, take your puppy to the vet quickly as dehydration can become a very real threat to your puppy's health.

Always put his food and water in the same place to avoid disruptions in his behavior. Dogs like stability, and moving his pot around will not help.

Avoid feeding him table scraps as this can disturb his digestive system and lead to certain behavior problems later on.

Make sure that his dining area is quiet during feeding times. It's difficult for a puppy to concentrate on eating when kids are running around, vacuums are running, and people are walking back and forth.

If other pets in the household are showing aggression, bullying or jealousy against your new puppy, keep them out of his eating area until he's finished his food. Nothing can jeopardize your dog's nutrition intake faster than animals trying to attack him or take his food while he's eating.

After you've ensured his dining area is free of distractions and disruptions, and if he's still not eating after a few days, take him to your veterinarian. Certain treatable conditions can interfere with his desire to eat. Worms is one common problem that can be cured quickly and easily.

Worms left untreated can cause your puppy to suffer with more serious dog nutrition issues because worms actually devour the food before your puppy digests it and absorbs its nutrient value. If left untreated, worms can cause more serious problems for your puppy. The sooner the condition is treated, the sooner your dog will recover and begin eating again.

A puppy's growth rate and long term health are influenced by his food intake. Puppies use up their nutritional intake more quickly during the formulation weeks and months than they do during adulthood. This means that they require more nutritional food to meet the body's growing needs.

During his first year, feed him a good quality commercial food that has been specially formulated to meet the nutritional demands of your growing puppy. By following these simple steps, you can ensure your puppy grows healthy and strong. It's all about making sure he gets good dog nutrition right from the start.
P.S. IS THAT A LHASA APSO? IF IT IS, I HAVE ONE RIGHT BESIDE ME.MY DOG MIKA. :) good luck with your puppy! I hope he's okay.

Maybe the food is to hard or she does`nt like the flavor.If it is to hard normally I wet my dogs food and make it really soft she eats it.
if its neither of them im sorry I could not help.

If you know your dog is just finicky here are some feeding tips you can try:
1. Feed At The same Time Every Day If your dog does not eat the food in 15 minutes pick it up and put it away. Do this a total of 2 times during a 24 hour period. Do not leave the food out because your dog will learn they can get food whenever they want.
2. Try Adding a Half a cup of Warm Water Let the water/food mixture sit for 5 minutes, and then offer it the same way as in tip #1.
3. An Adult Dog Can Go Without For a total of 3 days, as long as they are still drinking water. This is actually harder on us humans to watch, than it is on the dogs. Sometimes a dog knows his system better than we do, and will refuse food. This applies strictly to healthy adult dogs. Those with chronic disease such as diabetes, and puppies less than 3 months need to get to the vet. They should be eating regardless of how picky they are.
4. Feed In A Quiet Area Really shy dogs, those that have just come from a shelter, or those that are new to your family need a safe place to eat. A safe place is quiet, private (like a kennel or a porch), and free from distractions such as humans traipsing through to check on them. These dogs are not comfortable in their environment yet and need to feel safe. Of course, offer them food for 15 minutes, and, if they don't eat, put it away until the next day.
5. Try a Few Different Varieties Some dogs just do not like certain varieties of food. Try to get some samples from your pet store and see what they like. Do not try the pet food gravy or homemade sauces. Save these tricks for when your dog is really sick and you need something super enticing. If you start with these now, you will not have anything to offer if they really do become sick.

When I took my dog to the vet for the first time, the vet said if my dog wasn't eating, I should cook up some peppers and meat and mix it in with his food. Also, if you change the brand of food he eats too quickly, the dog won't eat it because its too fast a change.