Experienced and professional animal trainer provide their insights in answering this question :
A. It is very uncommon for dogs, especially two dogs who live together to develop asthma. They can however have asthma-like symptoms and this can be caused by aerosolized irritants (i.e. hairsprays, house detergents, painting supplies, etc).
I would investigate and look for causes of irritation in the home. If they are found remove them and I would recommend placing each pet in a small room with an air purifier/humidifier to help clear the airway for about 30 mins- 1 hr for a couple times a day.

If there are no irritants to speak of, then it sounds like a follow-up visit with the vet is needed to further investigate other possibilities (possible re-check lung sounds and/or chest x-rays) of why your pets are still symptomatic and what appropriate treatment is needed to help them get better.

Also just to note that pets don’t have to be kenneled or sheltered to catch kennel cough, they just need any close contact with other pets (such as pet-stores, dog parts, walks in the neighborhood). Kennel cough is highly contagious and is treated successfully in most cases with antibiotics, I like to use Doxycyline or Clavamox.

How to Identify Common Pet Problems ?

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One of the most common of these is heartworm, which can eventually escape beyond the dog`s heart and start infecting his lungs as well. Kennel cough is another common cause of wheezing, especially in dogs who have recently been spending time around other dogs.
Some of the most common reasons why your dog is coughing are heart disease, pneumonia, kennel cough, tracheal collapse, heartworm disease and canine influenza. Keep track of any other symptoms, such as coughing blood, mucus, foam, etc.
What does a dog coughing sound like? The most obvious symptom of kennel cough is a forceful, hacking cough, which will often sound like your dog has something stuck in their throat. The cough can be dry and hoarse or productive, in which case it can be followed by a gag, swallowing motion or the production of mucus.
Because kennel cough is contagious to humans, catching kennel cough from a dog is possible. However, the people most at risk are those with an underlying medical condition. Even then, it is still unlikely to develop symptoms.
How Is Kennel Cough Treated? Typically, mild cases of kennel cough are treated with a week or two of rest, but a veterinarian may prescribe antibiotics to prevent a secondary infection and cough medication to ease the symptoms.
Trouble breathing correctly: Dogs with very serious cases of kennel cough may have difficulty breathing correctly. If you notice your dog`s sides are heaving when they try to breathe or if they are panting heavily even without recent activity, this can be a sign they aren`t breathing the right way.
Sometimes when dogs become excited or anxious they can cough. This is usually seen in dogs with tracheal collapse (where part of their windpipe has begun to collapse) because their heightened state of excitement or anxiety means that they are breathing harder.
The classic honking, hacking cough which is often followed by a big retch at the end, lasts for one to two weeks in an average case. Usually the coughing is worse at night and in the morning and better during the day when the dog is moving around.
In most cases, dogs will recover from kennel cough without treatment within three weeks. It can linger for anything up to six weeks.
Kennel cough, also known as canine infectious respiratory disease (CIRD), is a collection of diseases that includes pathogens like bordetella bronchiseptica, parainfluenza virus, herpesvirus, adenovirus and mycoplasma.
In a collaborative study with the University of Florida and Cornell University, CDC researchers identified a new influenza strain that leads to “kennel cough.” Scientists performed a molecular characterization of canine influenza and revealed that the subtype, H3N8, of the influenza A virus is causative of the disease.
Dogs cannot get bronchitis from humans, nor can it be passed from dogs to humans. It is also not infectious or contagious to other dogs; dogs with chronic bronchitis will not pass it on to other dogs.
“If your dog seems to be worse in the early morning, late night or when excited, see your veterinarian,” Werber recommends. “Most cases clear up within six to 10 days. But severe cases can progress to pneumonia and be life threatening.”
Contact your vet right away if you spot any of the following: Coughing continues for more than seven days. Your dog loses their appetite. They develop a fever (this usually means they become lethargic)
Infectious Tracheobronchitis of Dogs (Kennel Cough)

Infectious tracheobronchitis results from inflammation of the upper airways. It is a mild disease that normally improves on its own. However, it can progress to fatal bronchopneumonia in puppies or to chronic bronchitis in weakened, ill, or aged dogs.

Symptoms of kennel cough usually take 3-5 days to develop after exposure. The classic honking, hacking cough which is often followed by a big retch at the end, lasts for one to two weeks in an average case.
Your dog comes into contact with all kinds of things, including dust, germs, and the occasional grass stem. All of these things can cause coughing, which makes it hard to determine if your dog`s cough is serious or simply the sound of your dog clearing her throat.
Most dogs with kennel cough recover completely within 1 to 3 weeks, though it can take up to 6 weeks in older dogs or those with other medical conditions.
If your dog has a cough and develops more severe symptoms like fever, loss of appetite, lethargy, nasal congestion and discharge, he may need more aggressive medical attention. Regardless of the severity and scope of any symptoms your dog is showing, talk to a veterinarian if your dog develops a cough.
Just like humans, dogs feel sluggish and want to sleep more often while they are sick, and this is true when your dog has kennel cough as well.
Some cases require prolonged treatment, but most infections resolve within one to three weeks. Mild clinical signs may linger for several weeks, even when the bacteria have been eliminated. Cough suppressants and anti-inflammatory medications may sometimes provide relief, though they are not often necessary.
Most cases of kennel cough resolve on their own within 10 to 20 days. There is no single cure for kennel cough, as it is typically caused by a combination of viral and bacterial agents, but some medications may be prescribed, depending on the case, to keep your dog comfortable and reduce inflammation in the airways.
The main symptom is a non-productive persistent dry cough that can sound somewhat like a goose honk or as if your pup has something stuck in their throat. Other signs of kennel cough in dogs can include runny nose, sneezing, lack of energy, decreased appetite and mild fever.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. I just adopted two dogs they have not been in kennels or shelters. Cleared by vet been sneezing coughing loosing breath sounds like asthm
ANSWER : A. It is very uncommon for dogs, especially two dogs who live together to develop asthma. They can however have asthma-like symptoms and this can be caused by aerosolized irritants (i.e. hairsprays, house detergents, painting supplies, etc).
I would investigate and look for causes of irritation in the home. If they are found remove them and I would recommend placing each pet in a small room with an air purifier/humidifier to help clear the airway for about 30 mins- 1 hr for a couple times a day.

If there are no irritants to speak of, then it sounds like a follow-up visit with the vet is needed to further investigate other possibilities (possible re-check lung sounds and/or chest x-rays) of why your pets are still symptomatic and what appropriate treatment is needed to help them get better.

Also just to note that pets don’t have to be kenneled or sheltered to catch kennel cough, they just need any close contact with other pets (such as pet-stores, dog parts, walks in the neighborhood). Kennel cough is highly contagious and is treated successfully in most cases with antibiotics, I like to use Doxycyline or Clavamox.

Q. My new puppy is coughing a lot and I think it is Kennel Cough. Could it be?
ANSWER : A. Kennel Cough is similar to the human cold, and it can be caused by three categories of microorganisms.

1. Bordetella Bronchiseptica: A small bacteria which can result in bronchitis and severe cough in dogs.
2. Canine Adenovirus: A serious and contagious virus.
3. Canine Influenza Virus: An extremely contagious virus causing mild to severe respiratory symptoms in dogs.
Kennel Cough has its own course of 1 to 3 weeks and can be managed medically.

Close environments with several dogs can increase the chance of dogs catching the cough. Kennel Cough vaccination is aimed mostly at preventing the Bordetella infection through an inhalant or injection vaccination. Although not 100% effective, it should be recommended in all dogs that spend time around other dogs, even the park is considered one of these social occasions.

Kennels have their own policy with regards to Kennel Cough vaccinations and should always be contacted well ahead to understand and comply with their requirements before the stay of your dog.
If you suspect that your dog has caught Kennel Cough, you should see your veterinarian. Your dog might benefit from certain medications to speed up his recovery. These might include antibiotics, anti-inflammatory drugs, and cough suppressants at your vet’s discretion.

Q. My dog keep hacking like a cough or something in her throat, what can I do?
ANSWER : A. Hacking and coughing can be caused by a number of things ranging from foreign bodies such as twigs stuck in the mouth or throat, to infections or illnesses such as Bordetella or Kennel cough, common in dogs that frequent kennels, dog daycare or dog parks. In older dogs, heart and lung issues can also be indicated by a cough that does not go away.

If you think there may be a foreign object stuck in your dog’s throat, you can sweep a finger gently through the back of the mouth or throat if your dog will let you. If something feels stuck and is not easily moved by the finger, it is best to contact your vet to have the object safely removed. This usually requires sedation so that your dog does not become panicked or move, causing the object to become further stuck or cut the throat.

If your dog is showing other symptoms of illness in addition to the cough such as runny nose or eyes, fever, lethargy or changes in appetite, it may indicate a viral or bacterial illness such as kennel cough. These are usually treated with a cough medication in severe cases, plus rest and treatment of any additional symptoms until the condition improves. In bacterial causes, antibiotics may also be given to help your dog feel better.

If your dog has a constant cough that does not go away, or has had changes in ability to exercise, breathing, or appears to have swelling around the chest or abdomen, in may indicate a lung or heart issue. Your vet can thoroughly examine your dog for any signs of heart or lung problems and can then offer care as needed depending on the cause.

Q. Rescued a dog almost two weeks ago, and now that her kennel cough is gone her personality shines!! No previous training, how should I start?
ANSWER : A. POST FOUR:

After your dog is familiar with the behavior you lured from scratch, and taught to your dog, you can start to use the “no-reward marker” I talked about. What you do is ask the dog to perform the behavior, and if the dog does not perform the behavior, you simply say your no-reward marker (choose one: eh-eh, hey, uh-oh, oops) show them the treat, put it behind your back, and BRIEFLY ignore your dog. Just turn your back for a second or two, before turning back to your dog and saying, “let’s try that again.” When you’re ready to start over with your dog, make sure you move around. If you are repeating the same cue while in the same position, while your dog is in the same position, you are likely to receive the same results. The more you move around, and start fresh, the better your chances are of having your dog listen to your cue the second time around. BIG rewards when they dog it successfully! Lots of praise and treats.

My no-reward marker is “hey.” When my dog does something wrong I say, “hey” and she immediately understands that she needs to offer a different behavior. This is clear to her. I don’t have to say it in a mean way, I simply say, “hey” in a normal tone of voice and she understands what the word means.

Once you’ve built up that connection and communication with your new dog, you can work on all kinds of fun behaviors! I personally enjoy the more zen-like behaviors: https://www.youtube.com/watch?v=ruy9UMcuGh8

I like to teach my dog fun tricks that offer her a “job” to do of sorts like object retrieval: https://www.youtube.com/watch?v=I4iertZSva8

(object retrieval training completed; what it looks like: https://www.youtube.com/watch?v=jx0Dml28FGY)

Scent-games are fun too! Very confidence building. Hide a REALLY smelly treat in a box, and place that box in a line of boxes. Let your dog go in the room while saying something like “search!” or “find it!” and watch them hunt for that smelly treat! Lots of rewards when they find it!

Q. My C. K. Charles has an asmathic cough. Ok most of the day, but worse in hotter rooms in the evening. What’s wrong?
ANSWER : A. Coughing in dogs can be caused by a number of things including allergies, asthma, illness such as Bordetella (kennel cough) or even lung and heart problems.

Allergies and asthma can cause a dog to have a raspy cough, and they may wheeze, sneeze or have running noses or trouble breathing when active or in an area where the allergen is present. Your vet can determine if an allergy or asthma is present and provide medication as needed to help with symptoms.

Bordetella can also cause a deep hacking cough, and is common in dogs that frequent doggy day cares, kennels or dog parks. The causes can be bacterial or viral, and treatment depends on if any secondary symptoms such as fever or dehydration is present. Treatment involves cough suppressants from your vet, or even antibiotics and fluids to treat secondary illnesses. Other illnesses such as heartworm may cause a chronic cough and exercise intolerance and should be looked for if your dog is not already on a heartworm preventive.

Small dogs are also prone to a condition called collapsing tracheas, and Cavaliers are very prone as a breed to heart and lung issues. Collapsing tracheae often cause a gasping or hacking cough when excited or active, and may require treatment if they become problematic. Heart and lung problems such as heart failure or genetic abnormalities can also cause coughing as a sign of the illness. Your vet can perform a complete exam to check the health of the lungs and heart.

Q. Whenever I take my dog on walks he always barks at people and others dogs in my neighborhood. What should I do to resolve the problem
ANSWER : A. The very first thing to do is to make sure your dog is getting sufficient physical and mental exercise every day. A tired dog is a good, happy dog and one who is less likely to bark from boredom or frustration. Depending on his breed, age, and health, your dog may require several long walks as well as a good game of chasing the ball and playing with some interactive toys.

Figure out what he gets out of barking and remove it. Don’t give your dog the opportunity to continue the barking behavior.

Ignore your dog’s barking for as long as it takes him to stop. That means don’t give him attention at all while he’s barking. Your attention only rewards him for being noisy. Don’t talk to, don’t touch, or even look at him. When he finally quiets, even to take a breath, reward him with a treat. To be successful with this method, you must wait as long as it takes for him to stop barking. Yelling at him is the equivalent of barking with him.

Get your dog accustomed to whatever causes him to bark. Start with whatever makes him bark at a distance. It must be far enough away that he doesn’t bark when he sees it. Feed him lots of good treats. Move the stimulus a little closer (perhaps as little as a few inches or a few feet to start) and feed treats. If the stimulus moves out of sight, stop giving your dog treats. You want your dog to learn that the appearance of the stimulus leads to good things.

Teach your dog the ‘quiet’ command. Oddly, the first step is to teach your dog to bark on command. Give your dog the command to “speak,” wait for him to bark two or three times, and then stick a tasty treat in front of his nose. When he stops barking to sniff the treat, praise him and give him the treat. Repeat until he starts barking as soon as you say “speak.” Once your dog can reliably bark on command, teach him the “quiet” command. In a calm environment with no distractions, tell him to “speak.” When he starts barking, say “quiet” and stick a treat in front of his nose. Praise him for being quiet and give him the treat.

As in all training, always end training on a good note, even if it is just for obeying something very simple, like the ‘sit’ command. If you dog regresses in training, go back to the last thing he did successfully and reinforce that before moving on again. Keep sessions short, 15-20 minutes max, and do this several times a day.

Q. How do you treat Bordetella?
ANSWER : A. Kennel cough is a term loosely used to describe a complex of infections—both viral and bacterial—that causes inflammation of a dog’s voice box and windpipe. It’s a form of bronchitis and is similar to a chest cold in humans. The incubation period is generally 3- 10 days. Infected dogs shed Bordetella organism for 2-3 months following infection.

Most dogs with kennel cough recover completely within three weeks, though it can take up to six weeks in older dogs or those with other medical conditions. Because serious, ongoing kennel cough infection can lead to pneumonia, be sure to follow up with your veterinarian if your dog doesn’t improve within the expected amount of time. Also, if your dog at any time has symptoms of rapid breathing, not eating, or listlessness, contact your vet right away, as these could be signs of more serious conditions. Although most cases of kennel cough will resolve without treatment, medications may speed recovery or minimize symptoms during the course of infection. These include antibiotics that target Bordetella bacteria and cough medicines.

You may also find that keeping your dog in a well-humidified area and using a harness instead of a collar, especially for dogs that strain against a leash, will minimize the coughing.

Q. I have a 10 year old mutt who is hyper but doesn’t like hyper dogs. Getting another dog from a shelter soon any ideas on calm breeds?
ANSWER : A. If your dog is uncomfortable with other dogs (of any sort), it is important that you bring your current dog to the shelter so he can meet the dog you plan to adopt. You should check out your local shelter, and walk around looking at all of the dogs. Mixed breeds have mixed amounts of energy and it’s tough to recommend a breed. I suppose I would say calm breeds would be the Great Pyrenees, the Newfoundland, the Bernese Mountain dog CAN be a calm breed.. really with any breed you will have mixed litters. Many breeders breed specifically the “calm” Newfies, or the “hyper” Bernese. If you are going to adopt from a shelter however, it’s impossible to expect that level of breeding.

As I said, just be sure you bring your dog along so you can slowly introduce the dogs. If your dog is uncomfortable, immediately separate them, and try again in a couple of minutes. You don’t want to force them to get along, and you don’t want to move too quickly when introducing them.