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We get a lot of warnings when we get a new puppy, but a serious infection is probably the most worrisome. The disease often referred to is parvovirus – or “Parvo” for short. This infection is both common and serious, so as a new owner of a puppy, or even the parent of an older dog, there are a few things you need to know. How Do Dogs Get Parvovirus? Can you prevent parvovirus? What should you do if you think your dog has parvovirus? Read on and we’ll get you started in no time.
What is tiny?
Parvo is short for Parvovirus. This is a canine disease caused by canine parvovirus type 2 (CPV). It first appeared in Europe in the 1970s, but soon spread around the world, including the United States. Not only does it cause illness in domestic dogs, it’s also been found in coyotes, wolves, skunks, and raccoons. It is closely related to feline panleukopenia virus (FPV), which causes disease in cats.

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How Do Dogs Get Parvovirus?
Parvovirus is a contagious disease, which means it can be passed from one dog to another. The simple answer is that your dog can get parvovirus from another infected dog. Dogs with parvovirus can shed the virus in their feces and vomit. Therefore, if your dog comes into contact with the feces or vomit of an infected dog, they may become infected. So, what exactly does “contact” mean?
Here are a few ways your dog can be exposed to the virus, known as direct transmission:
- sniffing poop and vomit. This can transfer the virus to their nose and from there into their gut.
- licking poop and vomit。 Puppies do this a lot as they explore the world around them.
- eating poop and vomit. Dogs often eat each other’s poop.
However, to understand how Parvo spreads, you need to know that the virus is very small. So if there’s a trace of feces or vomit on a surface, it probably contains a lot of virus. These are some other ways it can spread, known as indirect spread:
- eating from a contaminated food bowl. If one puppy poops or vomits near or in the food bowl and then another puppy eats from the food bowl, the infection can spread.
- drinking from a contaminated water bowl. If you are in a park or cafe and your dog drinks from a water bowl that has been previously contaminated with another dog’s feces or vomit, they could be infected with parvovirus.
- Contaminated Leashes, Collars and HarnessesIf a dog rolls around in a pile of feces or vomit, all of which may be stained with feces, they may become infected if they then bite or lick the leash, collar or harness. Sadly, dogs love to wallow in disgusting stuff!
- human hands and clothes. It’s easy to get pee and vomit (and thus possibly viruses) on our hands and clothes. This way, we can pass the virus from one dog to another.
Parvovirus is pretty tenacious! It can survive long periods (months) outdoors, even in cold conditions. It is also resistant to many household cleaning chemicals. This makes it almost impossible to avoid, especially if you live in an urban area with a high dog population.
How likely is it that my dog has parvovirus?
So, how much should every owner worry about their beloved dog getting parvo? Well, there are certain criteria that put some dogs at higher risk than others, so check your dog against this list.
How old is your dog?
Parvo is known as puppy disease. This is because puppies between the ages of 6 weeks and 6 months are most susceptible to infection. Pups do not acquire antibodies from their mother’s milk (assuming the mother’s milk has been vaccinated) until they are 6 weeks old. These are small proteins that circulate in the blood and fight off disease-causing viruses. Older puppies will be protected by vaccinations, but we discuss this in more detail below.
So why are puppies so susceptible? First, they are more exposed because they will sniff, lick and eat everything they come across. Second, their immune systems are not yet fully developed to fight disease. In the end, their bodies are not mature enough to cope with these symptoms like an adult dog. Things like diarrhea and vomiting can be life-threatening for puppies because their little bodies aren’t mature enough to handle things like dehydration.
When pups are weaned (moved from breast milk to solid food), their bodies are under a lot of stress. This weakens their immune systems, making them more susceptible to parvovirus and secondary infections.
What breed is your dog?
Some dogs are at higher risk for parvovirus, but the reasons for this are unknown.These include rottweiler, Doberman Pinscher, Labrador Retriever, English Springer Spaniel and German Shepherd.
For other reasons not yet understood Toy Poodles Cocker spaniels and cocker spaniels are less at risk.
How is your dog?
An immunocompromised dog’s immune system doesn’t work properly. This puts them at higher risk for many infections, not just parvovirus.
Dogs may become immunocompromised due to disease, treatment, or age.
What is your dog’s lifestyle?
If you live in a remote area where your dog never comes into contact with any other dogs, their risk of contracting the disease is reduced. However, don’t forget that you can still take it home with your shoes and clothes. Additionally, your dog may have been exposed to feces and vomit left by infected wild dogs, such as foxes, in the countryside.
Dogs who live in an urban environment and go to doggy day care with other dogs will almost certainly be exposed at some point.
How do I know if my dog has parvovirus?
You can’t say it right away. Within five to seven days after your puppy is infected, they will be completely normal. This is called the incubation period, during which the virus particles enter the body’s cells and multiply. However, the incubation period can be as short as three days or as long as 14 days.
Specific symptoms in puppies are:
- Very watery stools with blood in them (bloody diarrhea)
- Vomit
- fever
- Anorexia (not eating) and weight loss
- Lethargy (not wanting to move) and weakness
What should I do if my dog has parvovirus?

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If you suspect that your dog has parvovirus, you must take them to the veterinarian immediately. A puppy with Parvo is very sick, and the sooner they start treatment, the more likely they will survive.
Sadly, 70% of untreated dogs die. However, only 10% to 30% of dogs treated die. Most puppies will receive IV fluids, anti-nausea shots, and antibiotics. They need fluids to keep them from dehydrating. Antibiotics won’t kill the virus, but they will stop the bacteria from causing infection in the puppy while it is in such a weakened state. Once they start eating again, your pup may need special food to support their gut.
They will also stay away from other dogs so they don’t spread disease.
Because it is highly contagious, you must keep an eye on all other dogs in your household and any other dogs your puppy has been in contact with.
How can homeowners prevent parvovirus?
The best way to prevent parvovirus in puppies is to vaccinate them. In most areas, this is done over five to six weeks, with boosting every 3 to 4 weeks until pups are 3 months or older. Pregnant dogs will need further strengthening during pregnancy. Your veterinarian will be able to advise you on this.
You can also protect your puppy by keeping them away from other dogs and off the floor when they are very young. A crate allows you to take your puppy out and about without the risk of infection.
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FAQ (Frequently Asked Questions)
Can adult dogs get parvo?
Yes, older dogs can get parvo, they can get parvo just like puppies. However, in adult dogs with no medical problems, it is usually a mild disease. It might look like a bit of an upset stomach. However, if your dog exhibits any of the above symptoms, you should call your veterinarian immediately.
Can vaccinated dogs get parvovirus?
Infection with parvovirus in a vaccinated dog is very rare, but possible. For some reason, the vaccines don’t work and they don’t make antibodies. That’s why you should still be on the lookout for these symptoms, even in a vaccinated puppy.
Can Humans Get Parvovirus?
Humans can get parvovirus, but it’s not the same virus that dogs get. The human virus can cause a range of symptoms, including joint swelling and fifth disease, also known as “slap in the face” disease, which is common in children. Parvovirus cannot be transmitted between dogs and humans.
How long can dogs be infected with parvovirus?
Dogs become contagious several days after infection, which may be before they show symptoms. The virus was in their poo and vomit. They can continue to pass for 30 days – this may be after their symptoms improve.

I am broadly interested in how human activities influence the ability of wildlife to persist in the modified environments that we create.
Specifically, my research investigates how the configuration and composition of landscapes influence the movement and population dynamics of forest birds. Both natural and human-derived fragmenting of habitat can influence where birds settle, how they access the resources they need to survive and reproduce, and these factors in turn affect population demographics. Most recently, I have been studying the ability of individuals to move through and utilize forested areas which have been modified through timber harvest as they seek out resources for the breeding and postfledging phases. As well I am working in collaboration with Parks Canada scientists to examine in the influence of high density moose populations on forest bird communities in Gros Morne National Park. Many of my projects are conducted in collaboration or consultation with representatives of industry and government agencies, seeking to improve the management and sustainability of natural resource extraction.