Experienced and professional animal trainer provide their insights in answering this question :
A. It could be an allergic or toxic reaction. If the breathing is affected and it is disoriented it is wise to have it checked out by your vet straight away.

How to Identify Common Pet Problems ?

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

Pneumonia—Viruses, bacteria, and fungus can all cause inflammation or infection in the lungs. This leads to heavy breathing with coughing, nasal and eye discharge, lethargy, fever, and decreased appetite.
The most common symptoms of an allergic reaction in your dog are: hives (patches of red, swollen, itchy welts or bumps) also known as urticaria. facial angioedema (muzzle or eye swelling) itching.
Potential causes include inner/middle ear infections, intoxication, strokes, tumors, infectious or inflammatory diseases (meningitis), idiopathic vestibular disease (also called “old dog” vestibular syndrome), or other less likely causes.
Causes of Dog Rash

Here are some of the most common: Fleas and flea allergy dermatitis (an allergic response to flea bites that causes extreme itchiness and commonly leads to skin infections). Allergies. Most commonly, this includes environmental/seasonal allergies, also known as atopy.

Signs of ARDS include increased respiratory rate, blue discoloration of the skin and mucous membranes (gums, insides of the eyelids) due to poor oxygen delivery, and, occasionally, coughing. Some affected dogs may have pink, foamy fluid from the mouth or nose, which is coming from the dog`s lungs.
It is important to never give your dog human medications, such as acetaminophen or ibuprofen. These medications can be poisonous to your dog and cause serious injury or death. If your dog exhibits any other symptoms, such as shivering, panting, and vomiting you should consider taking your dog to the vet.
In more severe cases, your dog may have an immediate reaction, breaking out in hives, swelling, and vomiting shortly after ingesting the allergen. In many cases, however, it can take several minutes or hours, or as many as 14 days for your dog to start presenting symptoms.
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. Persistent vomiting and diarrhea can cause rapid dehydration, and damage to the intestines and immune system can cause septic shock.
Some signs of a stroke in dogs include a head tilt, circling, loss of balance, and unusual eye movements. If you think that your dog is having a stroke, don`t delay getting them to the vet for diagnosis and treatment. Treatment is mostly supportive, and it`s important to treat any underlying causes.
Allergies

As a breed, pit bulls are more affected by pollen, grass, ticks, or flies than other dogs. They are also affected by food allergies, particularly grain or wheat components. A pit bull with allergies will scratch, lick, drool, and shed abnormally.

Below are the common signs of heat rash in dogs: Red or pink blotches on low, fur areas (armpits, neck, tummy) Itchy or irritated skin. Persistent scratching and licking of affected skin.
Pyoderma is the most common bacterial skin infection in dogs. This bacterial skin infection is characterized by the presence of purulent (pus-like) discharge from the skin and is commonly caused by several species of bacteria.
Unlike people, your dog can`t sweat to cool down; instead, they need to breathe fast to allow oxygen to circulate efficiently through the respiratory system. Rapid breathing allows a dog`s body to get back to a normal temperature.
No matter which breed your dog is, heavy panting or fast breathing could be a sign that your pooch is suffering from an illness or injury that requires urgent veterinary care. A few potential causes of fast or heavy breathing in dogs include: Exercise. Smoke Inhalation.
Pain, Stress, and Anxiety

Dogs may exhibit heavy panting in response to pain, emotional stress, and anxiety. Dogs who suffer from separation anxiety are more likely to experience hyperventilation. They may begin to breathe rapidly as you prepare to leave the house.

Mild allergic reactions often cause symptoms such as: Itchy skin. A rash. A swollen face (especially around the ears, eyes, mouth and paws)
If your dog has hives, a swollen face, lips, or eye, or is panting excessively, see your vet immediately. These could be signs of a severe allergic reaction. Other than scratching, you may see these signs of itchy skin in dogs: Licking.
Swollen faces, hives, vomiting, trouble breathing, collapsing. These are the most common symptoms of an allergic reaction. Just like people, pets can have allergic reactions. And just like people, in rare cases an allergic reaction can progress to an anaphylactic reaction which can be life threatening.
In mild cases, the hives will generally disappear within 12-48 hours after contact with the allergen. However, because of the risk that the reaction can worsen to dangerous swelling of your dog`s airways or a serious allergic reaction called anaphylaxis, you should seek out treatment any time you see hives on your dog.
While they tend to come on in earlier years, there is nothing to say an older dog won`t suddenly develop one. Our furry friends are not actually born with allergies, and the likelihood of them developing one actually increases through being fed the same ingredients over and over again.
Dehydration is very serious; dogs with canine parvovirus refuse water and quickly dehydrate due to their constant vomiting and diarrhea symptoms.
Intestinal parasites: Intestinal parasites such as roundworms, hookworms, whipworms, coccidia, and giardia can cause gastrointestinal symptoms that can mimic the parvovirus.
Seizures, circling, falling, difficulty walking and behavioral changes can all indicate that your pup had a stroke. Your furry friend can have a stroke without you noticing it, as some signs are mild and unrecognizable to a pet parent. “The only way to diagnose a stroke is with an MRI of the brain,” Dr.
In the case of a stroke, your pet`s brain sends incorrect signals to their body. For example, your pet may not be able to respond to your spoken directions. Instead, he may move in a directionless fashion and seem to be walking in circles. He may appear as though he is drunk and be unable to walk in a straight line.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Pit Bull rapid breathing slight fever acts kind of disoriented. Has a rash all over his body
ANSWER : A. It could be an allergic or toxic reaction. If the breathing is affected and it is disoriented it is wise to have it checked out by your vet straight away.

Q. How do I know if my pet is overweight?
ANSWER : A. There are many ways to determine if your pet is overweight: breed standards, body condition score (BCS), body fat index (BFI), and morphometric measurements. These tools are used to determine how overweight a pet is, as well as to determine how much to feed to reach the pet’s ideal weight. Most weight loss programs fail because food dose calculations are based on inaccurate estimations of ideal body weight.

Current methods of estimating ideal body weight (body condition score/ guessing) are most likely to underestimate % body fat and therefore overestimate ideal weight, which leads to overfeeding. Pets are being overdosed on food because of inaccurate estimations of ideal body weight.

To determine body condition score it’s often helpful to have a scale from 1-5 to compare to: http://www.hillspet.com/weight-management/pet-weight-score.html. This scale is based on your ability to feel or see the ribs, the size of your dog or cat’s waist, and the appearance of the abdomen.

An overweight animal can be predisposed to several health conditions including high blood pressure, arthritis, endocrine disorders such as diabetes, and hypothyroidism. This is why it is important to determine an ideal weight for your pet and work hard to maintain a healthy weight.

Q. My cat started to pee outside the litter box. What should I do?
ANSWER : A. Inappropriate bathroom use in cats is often a behavioral problem rather than a medical problem, so the first step is to have him seen by your vet to eliminate any kind of illness or condition as a cause for his defecating outside the box.

Once medical issues are ruled out, it’s time to take a look at other explanations. Has there been a lot of activity that wasn’t normal? Were you away and your cat was left at home or boarded? Is the litterbox located in a busy area? Has anything happened recently in this area to make him reluctant to use it again? Is there another cat, pet, or person that is preventing him from getting to the box? Have you changed it from a hooded to an open box, or vice versa? Have you changed the brand of litter or kind? Or is there something about the spot he has chosen to use that is attracting him in some way? Cats dislike disturbances to their routine and may act out as a way of expressing their dissatisfaction.

The general rule of thumb is one litter box per cat in the household, plus one. That way each cat can have a place of their own to go in case the box is occupied or another cat has claimed it as territory. They should be scooped at least daily, if not more often and changed completely on a weekly basis, and washed with soap and water.

You can also offer one kind of litter in one box and another kind in another to see if there is a preference. I don’t recommend the crystal kind, since it makes a hissing sound when wet that can startle some cats and make them reluctant to use it again.

The litter boxes should be located in a quiet, low-traffic area so that the cat can use them in peace. Make sure other pets or people aren’t giving them a hard time around or in the litterbox. It may take some investigation and experimentation to find your cat’s preference and accommodate him so that everyone is satisfied with the situation.

Q. Our pit mix is running a fever after having routine vaccinations on Friday (flu, rabies, bortello – sp?) What can I do to help reduce the fever?
ANSWER : A. Fever should disappear within 24-48hrs post vaccination. If your dog still has high temperature you should take him/her to your vets. There is nothing that you can give him/her at home to reduce fever.

Q. My dog is breathing abnormally. No vomiting, no nasal discharge, no fever. Gave him benadryl and ibuprofen, helped cough. Breathing is still heavy.
ANSWER : A. Advil or Ibuprofen is highly toxic to dogs and cats and should never be given. Tylenol is another medication that is toxic. Human medications should never be a first resort. If your dog is experiencing pain, I would recommend that you call your vet’s office and they can suggest some pet friendly pain medication. I would recommend calling your vet immediately due to the breathing issues and due to the fact that he was given ibuprofen. He could have blood thinning issues, liver issues and trouble breathing needs immediate veterinary assistance.

Q. 12 rapid stomach breathing, has warm nose, appetite not so much, breathing is deep and a lot faster then normal breathing.
ANSWER : A. Breathing difficulties is always an emergency situation. Abdominal breathing pattern is common in animals suffering from respiratory tract problems. You should take your pet to your vets without delay.

Q. My Pit Bull ate a lot of deer carcass and she hasn’t been very active since; for last two days she has just layed around, won’t walk. Please help!
ANSWER : A. Eating a lot of food that your dog is not used to can cause severe digestive upset such as pancreatitis. Ingestion of foreign bodies such as bones or bacteria from the carcass can also cause a dog to become very ill. Symptoms of these conditions may include vomiting, diarrhea, blood in the vomit or diarrhea, painful abdomen or hunched back to protect the abdomen, lethargy and loss of appetite.

Dogs should be kept away from eating dead or raw meat found in the wild to prevent illness, ingestion of foreign bodies and the spread of internal parasites. In minor digestive upset, picking up food for a few hours then feeding a bland diet of plain boiled chicken and plain white rice can help to settle the stomach. However, it is best to contact your local veterinarian for an appointment to make sure there is not a foreign body or serious illness such as pancreatitis causing her symptoms.

Q. Dog, fmale, 7 y/o: area around rectum is bright red, inflamed/ bleeding slightly/ Stools slightly loose. Eaten plums & 2-3 pits. Acts painful
ANSWER : A. I would recommend that you have her checked over as the pits could be causing a partial obstruction with pain, inflammation and blood. I