Experienced and professional animal trainer provide their insights in answering this question :
A. It could be that he is a bit of pain or discomfort. If it has been going on for more than half a day I would recommend contacting your local vet.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Dogs who have anxiety issues often develop clingy dog behaviors. Interestingly, dogs can also become clingy if they sense our stress or anxiety. Dogs can also become clingy if you change their daily routine or make changes in the home or household that cause them stress.
There are many reasons your dog may be clingier than usual. Some dogs are stressed or anxious, which can lead to separation anxiety. Age, changes in their environment, and health may also be factors. If your dog is “glued to your hip” suddenly, not to worry.
As your dog`s world becomes less familiar, he`ll stay close to you as a source of comfort and familiarity. Clinginess or neediness can also be signs of other health issues, so it`s a good idea to talk to your vet to rule out anything serious.
Dogs that aren`t feeling well may appear restless. Because they are in discomfort or even in distress, they may pace about your home or not sleep well at night. Dogs, for example, that are suffering with a life-threatening condition called bloat may appear agitated, uncomfortable and restless.
If your dog stays calm when following you around it`s fine — it`s a common behavior that many of us find flattering. But if your dog gets anxious when you get up it`s a sign of separation anxiety. If your dog a a mild case of separation anxiety one thing that can help is giving them something to do when you leave.
Why do dogs become attention-seekers? One of the most common reasons is that they are bored. This could be because they are not getting enough exercise, enough mental stimulation, or they are genuinely not getting enough attention from their owners.
If your dog follows you everywhere then it`s a sign that they trust and love you and that you make them feel safe. Following you very closely can be a sign that they`re bored, they want something, they`re feeling scared or are just being nosy.
Separation anxiety describes dogs that usually are overly attached or dependent on family members. They become extremely anxious and show distress behaviors such as vocalization, destruction, or house soiling when separated from the owners.
Unfortunately, puppies don`t just grow out of separation anxiety. If you leave it untreated, it will likely just get worse, and it certainly won`t get any better! However, thankfully, it`s not too difficult to treat and just takes a little TLC and training.
A dog who suddenly can`t or won`t lie down, has labored breathing when lying down, or assumes the “praying position” of lying down with his bum in the air, may be experiencing pain or discomfort due to a serious medical condition: pancreatitis, bloat, or heart disease, for example.
Dogs most commonly whine when they`re seeking attention, when they`re excited, when they`re anxious or when they`re trying to appease you.
But can dogs have ADHD? The answer is more complex than you may think. While hyperactivity in dogs can be common, other ADHD-like behaviors may stem from a rare condition known as Hyperkinesis.
Pet or Massage Your Dog To Relax Them

By petting or massaging your dog in a calming way, you can help their muscles relax. In order to fully calm them down, it is best to avoid any more excited petting that could make them less tired. Instead, focus on long and soft pets through their fur.

In a distraction-free environment ask her to lie down and then gently stroke her and see if she responds by lying on her side. When she does so, say the word relax. When you have repeated this exercise a number of times over a few days ask her to lie down and then say the word relax.
Dogs choose their favorite person in many ways. Signs you are your dog`s favorite person include them wanting to be around you, licking you, and wanting to play.
Your pup isn`t likely to be naughty just to spite you. Just like a kid, your dog is trying to get your attention in the best way they know how. And just like a kid, even negative attention is attention. That`s why so many dogs start misbehaving for attention just when you`re the most busy with other things.
Dogs can absolutely sense when their owners are too busy to pay attention to them when they are around. They are aware of your actions and behavior as their owner, and as a result, their mental and physical health can suffer if their owner or trainer does not pay enough attention to them.
Generally, there are three primary ways that you can tell when a dog needs your help: physiological changes, behavioral changes, and signs of pain or discomfort.
Separation Anxiety Can Cause Your Dog to Not Leave Your Side

This is triggered when you and your dog are separated for any amount of time, and some dogs can become very agitated when you leave them behind at home, while others seem depressed when they see you getting ready for work or packing your bags.

He Wants Some Attention

Dogs love attention from their owners—especially when treats always follow. He can also sit in a corner and stare. These pack animals want to constantly feel like a part of something.

Just like their human pals, dogs are likely to choose a favorite person based on a number of factors. Some of these include the person`s demeanor, interactions with the dog, and how well the person helps meet their basic needs.
There is nothing wrong with cuddling and playing with your new puppy, but try to limit picking them up. Continually holding your dog can make them begin to feel as though they are human and can encourage behavior that causes dominance struggles within your home.
Puppies in particular will tend to bond with the person who offers them the most attention and provides them with food and daily care. Adult rescue dogs can also choose to spend more time with one person over another. Certain breeds, such as German Shepherds and Chow Chows often gravitate towards just one person.
Puppies typically develop the emotional maturity and temperament of an adult dog between twelve and eighteen months of age, although they may continue to occasionally exhibit puppy behavior like chewing and nipping until they`re about two years old.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. How do I get my dog to stop chewing on things? I kennel her when I leave for a few hours, but I can’t go to the mailbox without her eating something.
ANSWER : A. If she’s young, then this is just normal puppy behavior. Don’t worry about it. The thing about puppies is, they explore using their mouths. If your puppy grabs a coat hanger, or a slipper, you should roll up a newspaper, and smack yourself on the head with it for leaving those things out.. your puppy is going to explore things, that’s normal! It is 100% up to YOU to keep those things away from your puppy when your puppy is unsupervised… even for just a moment.

Remember to never scold your puppy for grabbing these things. They are just curious little cuties, and they don’t chew things up to bother us.. Dogs do not have intentional thought, so they aren’t ever doing anything ON PURPOSE to us.. The most important thing you can do when your puppy is chewing something you don’t want her to be chewing is TRADE her the inappropriate item with a toy of hers, so she understands “no honey, that isn’t what puppies chew on… THIS is what puppies chew on!” and then begin playing with her using her toy to show her that TOYS ARE FUN.. Way more fun than a boring ol’ coat hanger.

Another helpful thing you can do is have two bags of toys. In each bag is many different kinds of toys. Lots of chew toys, lots of soft squeaky toys, lots of rope-type toys, a bunch of balls.. All kinds of things! For one week you have bag#1’s toys out for your puppy to play with.. At the end of the one week, you collect those toys, and you bring out bag#2! The toys will be more interesting/feel like new to your puppy, which will in-turn, make her chew less inappropriate things. Her toys are too fun to care about that dumb Wii-mote that you left laying around.

Hope this helps!

Q. My puppy is urinating a lot. And the lady I gave one of the puppies to said she thinks her puppy has diabetes could my puppy have it to
ANSWER : A. It is not likely that either one of these puppies has diabetes. It is very uncommon for a puppy that young to have diabetes. If your puppy is straining to urinate or is urinating very small amounts frequently and cannot seem to wait for very long between urination, he may have a urinary tract infection. It is quite possible that your puppy is completely normal. I would suggest an exam with your veterinarian and discuss the behavior with them. They may suggest a urinalysis. Your puppy should be going to the vet at 3 week intervals for vaccinations at this age, so you can discuss it when he has his next set of vaccines. The other person with the other puppy should also be taking hers to a vet for proper immunizations and she should also discuss her concerns with her vet.

Q. What kind of food is recommended for a puppy Labrador and how often should I feed him?
ANSWER : A. Puppy food is designed specifically for the nutritional needs of young and still growing dogs, with twice the daily nutritional requirements that a mature dog needs.

Puppies are growing and developing rapidly — in their bones, muscles, joints, internal organs and immune system, to name but a few of the developmental needs that are being met by nutrition. A well balanced puppy food contains those nutrients that a puppy specifically need for this purpose, nutrients that are not necessary once the puppy has finished growing into a dog and that are not added to adult formula dog foods. For example, to build a strong body, puppy food contains about 30 percent protein, as well as the vitamins and minerals that are needed for a puppy to be healthy.

Q. I have 2 puppies that I think may have parvo, the little one is throwing up thick bubbly puke and watery stool. Can the vaccinated mom still get sick?
ANSWER : A. If you suspect one or both of your puppies have parvo, it is best to bring them into a vet for care. Parvo is a very serious and contagious disease and it can kill puppies without proper treatment.

As Parvo IS very contagious, it is best to keep the sick puppy isolated from any other dogs in the house. While your adult dog is less likely to get ill due to vaccination, no vaccine is 100%. Your other puppies if not vaccinated are also very likely to get ill. Be sure to thoroughly clean any surfaces your sick dog comes into contact with as Parvo can live in the environment for up to several months if not properly cleaned.

If your puppy is very ill, your vet can run a fecal test to look for Parvo. Parvo symptoms usually include vomiting and diarrhea that often is blood-tinged. Parvo can cause dogs to become very dehydrated and unable to keep food, liquids or medications down and usually require hospitalization and IV fluids to provide medications and nutrition while they are ill.

Q. How long should I feed puppy food to my puppy?
ANSWER : A. A puppy should be given puppy food from around the time that the mother begins weaning her pups until the puppy reaches about the age of one year. This is generally true for all dogs, unless your veterinarian has concerns about your puppy’s growth. Under those circumstances, your veterinarian will make alternate recommendations for your puppy’s diet. Otherwise, around one year, you may begin giving your puppy an adult formula dog food at meal times.

Read Full Q/A … : What should you feed a puppy?

Q. What solid food should I start 4 week old Pit Bull puppies on?
ANSWER : A. A puppy food designed for large breed puppies can help with rapidly growing bones and joints and can be given in a wet form easily to puppies learning to eat solids. You can also provide a dry kibble for them to try and should moisten it with water or some formula to make it easier for the puppies to eat and digest. As the puppies grow and their teeth come in, they will begin to eat and explore more of the solid food on their own.

Mom should also be on a Puppy formula while nursing her puppies as it will provide extra nutrients to both her and babies while they are in a very rapid stage of growth!

Q. How much should I feed my puppy?
ANSWER : A. Puppy food packaging usually contains information on the recommended amount of food that a puppy needs. However, the amount can vary depending on your puppy’s particular breed, weight and size, whether the puppy has specific nutritional requirements that deviate from the norm, and sometimes, on how active your puppy is. If you have any questions or concerns regarding how much you should be feeding your puppy at each meal time, consult your veterinarian.

Q. How do I tech my puppy to tell me when he needs to go outside to go potty?
ANSWER : A. I would suggest that you have a one on one consultation with a Petcoach consultant such as myself and I would suggest that you sign your puppy up for a puppy class. Puppy class Dog trainers help teach their students everything and anything concerning puppy care and training. They can help you with potty training, biting, chewing, toys, care, commands, ect. Also you will be able to socialize your puppy with other puppies at a young age which you NEED to do! If you have a dog that was never socialized with other dogs it will become fearful and even aggressive and bite other dogs later in life.