Experienced and professional animal trainer provide their insights in answering this question :
A. It is bile that is being vomited. If it happens more than a couple of times or the puppy is very lethargic then you should see your vet as soon as possible. They can do it because they have eaten something that hasn’t agreed with its stomach, parasites, due to infection either viral or bacterial, or due to a blockage.

How to Identify Common Pet Problems ?

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

The vomiting of yellow mucus may be an indication that there is bile in the dog`s vomit. Bile is an alkaline fluid, which helps with digestion. It breaks down lipids (fats) into smaller particles, which the body is then able to digest.
Why Do Dogs Vomit Clear Liquid? Clear liquid vomit generally consists of saliva or water. It may or may not have some foamy parts to it as well. One simple explanation for vomiting clear liquid is that the dog drank too much water or drank the water too quickly.
If you see your dog vomiting yellow bile when he also has constipation or can`t keep any fluids down … take him to the vet right away. If your dog repeatedly vomits yellow or white foam, or he`s trying to vomit with nothing coming out, it could be a sign of bloat (also called GDV – gastric dilatation and volvulus).
You can try feeding her a bland diet mixture of boiled white chicken and boiled white rice for 2-3 days and see if that helps settle her stomach. If she continues to vomit or becomes lethargic, then she should see your veterinarian right away.
If your dog is suffering from bilious vomiting, you should try to provide them with their normal dog food just before they go to bed. Then, you should feed them again right after you get up in the morning. This is especially important if you notice that the vomiting episodes typically happen first thing in the morning.
Your puppy might throw up as the result of starting a new food, eating too fast, stress, or food sensitivities. You`ll want to take your puppy to the vet right away if they`ve eaten a foreign body or something toxic; there is blood in their vomit; their gums are pale or white; or if they are lethargic.
Vomit may be clear or a yellow or brown color, and diarrhea will often contain blood and be a light yellow or mustard colored hue. In addition to vomiting frequently, your puppy may also appear to be drooling or foaming at the mouth as part of their parvo symptoms. Your puppy`s nose may also begin running.
If your dog is throwing up, but still acting otherwise normal, it`s possible that your pet has either chronic gastritis (inflammation of the stomach) or food indiscretion. Food indiscretion in dogs is very common when they get so excited about eating that they eat too fast or too much, and some of it comes back out.
Yellow vomit in dogs can be caused by a variety of factors such as bile buildup, food allergies, empty stomach, intestinal blockage, or worse, liver disease. Regardless of the cause, your dog`s gastrointestinal tract is trying to tell you something and it`s important that you find out the underlying cause.
Sometimes dogs will occasionally vomit bile if they go too long without eating or if they are vomiting on an empty stomach or with a high frequency. Vomiting of bile that occurs in the morning can be an indication of a more rare disorder, bilious vomiting syndrome (BVS).
Since the color yellow almost always indicates bile, your dog throwing up yellow bile could also indicate a more serious gastrointestinal disease or disorder, such as inflammatory disease, parasites, cancer, pancreatitis, or infections.
If a dog throws up until their stomach is empty and then continues to retch, they will throw up yellow bile – but it`s better to take them to the vet before they progress to that point. If your dog is also low in energy and displaying signs of extreme abdominal pain, they may have a blockage.
What can I give my dog for throwing up bile? If your dog is otherwise bright and has only been sick once or twice you could try feeding them bland easy-to-digest food little and often. This includes a specially formulated sensitivity diet, or – in an emergency – cooked chicken, white fish, and white rice.
Yellow Vomit

This is the most common type of vomit we see in our dogs. Yellow vomit is a direct signal that your dog has an empty stomach. The yellow colour you see is due to bile secretions. This is typically referred to as “hunger pukes” and will often occur in the middle of the night or first thing in the morning.

Yes, it is not uncommon for puppies to vomit often. Puppies are subject to a range of condition and experiences that trigger vomiting such as eating too much, too often, eating foreign objects or intolerance to human foods, consuming toxic or poisonous substances, or as a reaction to conditions of stress or anxiety.
Prompt attention from a veterinarian should be sought if your dog vomits multiple times in one day or for more than one day in a row. In addition, you should seek veterinary attention if your dog shows the following symptoms accompanied by vomiting: Loss of appetite. Change in frequency of urination.
Why is my puppy throwing up clear liquid? Clear liquid vomit is just water and saliva. You`ll see this when your puppy has an empty stomach, and it can be caused by a number of things, like having a stomach irritation, coughing, drinking too much water or drinking too quickly.
Vomiting is the ejection of contents of the stomach and upper intestine; regurgitation is the ejection of contents of the esophagus. Regurgitation often, but not always, happens right after eating and the pet will try to eat the regurgitated food.
Consistency: Vomit can be chunky, granular, foamy, slimy or liquid. Chunky and granular vomitus are often (but not always) related to food, treats or even something else your dog ate that doesn`t agree with his or her stomach.
Some of the signs of parvovirus include lethargy; loss of appetite; abdominal pain and bloating; fever or low body temperature (hypothermia); vomiting; and severe, often bloody, diarrhea.
In cases where the cause is thought to be dietary indiscretion, your veterinarian may advise you to withhold food for a short time, until vomiting appears controlled. After this time, you may be advised to feed your dog a bland, easily digested diet.
Vomiting or Diarrhea

If your dog vomits three or more times over a period of eight hours, you should be worried. If there is any blood in either, you should take your dog to the vet immediately.

The vomiting of mucus, which is often white and phlegm-like, can be caused by a variety of medical conditions. The very occasional bringing up of mucus is not a cause for concern; however, if your dog is throwing up mucus often, a veterinary visit is warranted.

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. 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 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. 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. My puppy ate 2 peanut butter with chocolate chip granola bars.
ANSWER : A. It is important to know your pup’s weight, age, and breed. It takes a decent amount of milk chocolate to cause any issues in a dog. However, if it was dark chocolate, and your dog is very small (2lb small breed) then you should consider going to the vet. If your dog is a little larger, I wouldn’t worry about it too much. Keep a very close eye on your puppy for the next couple of days, and check each bowel movement.

I am hoping you didn’t scold your dog for eating the granola bars. I say this because you may have, when truly, it was your own fault. Allowing your puppy to get into trouble like that is irresponsible. A puppy should be crate trained, and crated when unsupervised. Not only that, but if your puppy had already eaten the granola bars, scolding is pointless. Scolding after the fact is always pointless. If you’re going to scold, or redirect your puppy, you should do is DURING the act, and not after. The puppy will only learn that you are scary, and unpredictable if you scold after he has done something bad and forgotten about it.

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.