Experienced and professional animal trainer provide their insights in answering this question :
A. There could be a variety of reasons for this, I would recommend seeing your regular veterinarian. It could be fleas, a lot of fleas stay around the tail area. Make sure you’re on a high quality flea and intestinal parasite prevention such as Frontline Plus and Hartgard. If there is hair loss I would recommend seeing your veterinarian as well.

How to Identify Common Pet Problems ?

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

Puppies bite their tail because of fleas, ticks or worms

And yes, this means there might be a possibility that your puppy may be chewing their tail due to a parasitic infection. Fleas love to live around a puppy`s bottom and ticks too, as they can hide in their fur.

Stress, anxiety and boredom: Any or all three can lead dogs to exhibit a variety of repetitive and often destructive behaviors – including biting and chewing their tails. For some, it`s because they`re left crated too long while their owners are gone during the day.
Food or environmental allergies

Another common reason why your dog may be persistently licking or biting at the base of the tail is allergies. Dogs get allergies just like we do, which are usually food or environment-related. Food allergies are more likely to occur year-round or when diet is suddenly changed.

The good news: in the vast majority of cases, puppy biting and mouthing is EXTREMELY normal, for several reasons: Puppies explore the world with their mouths. They go through an uncomfortable teething process that lasts for 2-3 months.
Young pups chew their tails as they become aware of their body parts. Imagine puppies thinking, “What is that thing following me around? I`ll grab it and see.” Pups consider the tail as a toy rather than anatomy. Youthful tail chasing is usually a passing phase that does not require intervention.
Allergies may be making your dog very itchy and causing him to bite at his tail. Allergies may be caused by fleas, diet or by environmental allergens. The most common food allergens are beef, dairy, corn, wheat and soy. Environmental allergens may include mold/mildew, and tree, grass and weed pollen.
Puppies chew at their tails when they`re stressed or bored

If your puppy starts chewing their tail when you leave them, crate them, or when they`re bored, it might be an indication that they need more company or mental stimulation.

Coughing, diarrhea, vomiting and lethargy are the general signs the dog has worms. Other symptoms depend on the type of worm.
Undesirable behaviours such as barking, chewing, counter surfing, house-soiling and jumping up commonly begin to occur at around 3-6 months of age. Your puppy will not grow out of these behaviours. On the contrary, it is more likely that these behaviours will worsen if not addressed early on.
Your pup can injure their tail the same way you can break or sprain an arm or leg. The longer the tail, the greater the possibility of an injury. Dogs are great at communicating what they are feeling; you just need to know what to look for: The first indication your dog`s tail might be injured is behavior.
Dogs that chronically bite/chew/lick their paws or legs are experiencing more than just a typical itch. It could be that your dog has developed an allergy or is suffering from an insect/bug bite or a fungal infection.
For home remedies to help relieve your dog`s itchy skin, try applying 100 percent aloe vera gel. Skip shampoos. And feed them probiotic supplements, flaxseed, and fish oil for added itch-relief benefits.
In general, it is good practice to avoid touching your dog`s tail, unless you suspect injury or need to check the areas surrounding a dog`s tail.
As well as itching, red pimples or bumps on your pet`s groin, belly, under the legs, or at the base of their tail may be a sign that your pet has fleas. Hair loss and dry skin due to scratching may also be a sign of fleas on your dog or cat.
Collect a Sample of Your Dog`s Stool

Your veterinarian may ask you to bring a fresh sample of your dog`s stool from home, especially if you are seeing worms in their feces or notice dried, rice-like segments in their fur. You only need a small amount of feces; usually about a teaspoon-size sample will do.

Stage 5: Adolescence (6 – 18 months) This can be the most difficult time during a puppy`s development – adolescence. Your cute little puppy is becoming a teenager and will start producing hormones which may result in changes in behaviour.
The most challenging time of raising a puppy is the adolescent period. Dogs become “teenagers” and seem to forget everything they have ever been taught. This period is individual to each dog, but it may begin when he`s about eight months old and continue until he`s two years old.
For the Lip Roll technique, you roll their lip onto their teeth and press down slightly as they bite, until they pull away. Alternatively, for the Jaw Pinch technique, you press your thumb down on top of their tongue and pinch down against your forefinger on the underside of the jaw again until they pull away.
For those three months or so, you`ll likely see an increase in nipping and biting behavior as your puppy deals with the pain and discomfort of losing their baby teeth and their adult teeth coming in. Preventive Vet office pup, Finnegan, shows us a close-up of his adult teeth growing in.
The most important thing to remember is that for the vast majority of puppies, mouthing or play biting is a phase that they will typically grow out of once they reach between three and five months of age.
Conclusions: Humans can be exposed to rabies even by pups below 3 months of age.
Sometimes dogs will chew their tail to ease itching or discomfort caused by an allergic reaction. Fleas. Fleas are small bugs that can attach themselves to dogs and cause discomfort. Tail chewing may be a sign that your dog has fleas.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. How should I interpret my cat’s tail movements?
ANSWER : A. Our feline friends express themselves in many different ways, including through the use of their tails. Most pet owners pay close attention to a happy or excited dog, but they are sometimes less attentive to the posture and movement of their cat. Here are some of the most common cat tail behaviors, and the underlying emotion behind each action:

A flicking tail: Many anxious, nervous or stressed cats will hold their tail in a low position and flick it quickly back and forth. This is often referred to as angry tail, and a pet owner or veterinarian should be on guard for any possible aggressive or defensive activity. If a cat is moving their tail slowly, and not exhibiting the flicking motion, then this cat is at a much calmer state.

Vertical position: Most of the time when a cat is holding their tail in a straight, vertical position this is indicating curiosity and a playful mood. A cat chasing after a laser pointer or playing toys will often have their tails in a vertical position showing their enjoyment. This position also helps with balanced movements. In contrast, if the tail is in the vertical position and the cat’s back is arched with pinned back ears then this could demonstrate a feeling of being threatened and thus result in defensive or aggressive behaviors.

The Tucked Tail: Similar to a dog, a tucked tail often indicates submission or fear. Your cat is conveying upset feelings and should most likely be left alone. This tucked tail appearance can also make a cat look smaller and less threatening to an aggressive cat.

The Tail Twine: Cats will often hook their tail around another cat’s tail, owner’s legs or other objects to show a friendly and affectionate nature. They are also trying to indicate whether they want to receive affection from their owners, be fed or have playtime.

The next time you are home with your feline companion take note on how they express themselves through their tail movements, their ears, body posture and vocalization. You can start to better understand their needs and wants, in addition to what makes them uncomfortable or happy. Cats will surprise you with their array of emotions and varied expressions they can express.

Q. I’m fostering some now motherless 5 week old Pitbull puppies. There are 5 of them. How much do I feed them? I give them blue buffalo puppy food by wa
ANSWER : A. It should say on the Blue Buffalo on the back under, “puppies” or some sort of age chart. Make sure it’s puppy food.. puppies need extra protein and nutrients. http://bluebuffalo.com/product-finder/dog/?facets=Puppy,Dog_DryFood#

http://www.bullytree.com/wp-content/uploads/2013/08/Feeding-Chart-Blue-Buffalo.gif – On the back of a puppy-food bag from Blue Buffalo it says underneath 3-5 months, “3 to 20 lbs: feed 1/3 – 1 1/4 cups per day” and “21 to 50 lbs: feed 1 1/2 – 3 cups per day.” Make sure you are breaking that up into at least three meals. Let’s say you decide to feed them 1 1/2 cups per day each, then, you should measure that out, and set it aside. Throughout the day, you should offer at least three mealtimes with that set-aside amount. You want to start with the least amount, and then if they seem hungry (licking the floors, begging you constantly for food, whining/crying) feed them a little more until you get it right. Do not overfeed, and try to avoid underfeeding a well.

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. My Pitbull puppy has lick and bitting her tail she is 3 and half months old ?
ANSWER : A. There could be a variety of reasons for this, I would recommend seeing your regular veterinarian. It could be fleas, a lot of fleas stay around the tail area. Make sure you’re on a high quality flea and intestinal parasite prevention such as Frontline Plus and Hartgard. If there is hair loss I would recommend seeing your veterinarian as well.

Read Full Q/A … : Leerburg

Q. Why does my pup lick everything?
ANSWER : A. Puppies are very much like babies and young toddlers, and will explore the world with their mouths. This may include chewing objects, or licking them. Puppies and other more submissive dogs may also lick people as a way to “appease” them and try to gain favor. If your dog is licking objects, then using something such as a no-lick spray and providing appropriate other toys to explore can help curb the behavior. If you are the one being licked, then ignoring your dog or getting up and moving away when the licking begins can help stop the behavior. Be sure, however, to still give your pup lots of praise when NOT licking!

Q. I am worried because I have a 3 old month puppy chihuahua mix and I just brought in a 1 month puppy pit bull and my 3 month puppy is vomiting a lot
ANSWER : A. Since you are bringing a new puppy into a new home, it is important to get them looked at by a veterinarian to make sure they are vaccinated and checked for parasites. There are diseases that can be spread from young dogs very easily. I would check and make sure both are up to date.

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!