12 Reasons You Should Never Leave Dog Poop In Your Yard

Written by Sharon Parry
Updated: October 24, 2023
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Whilst scooping poop may not be the most glamorous aspect of owning a dog, it is one of the most essential. Dogs take a poop several times a day and as their owner, it is your responsibility to collect it and dispose of it appropriately. It is estimated that the 83 million pet dogs living in the US produce 10,600,000 tons of poop each year. Some owners are fastidious about picking up their dog’s poop from the sidewalk or parks but are not so conscientious when it comes to their yard. Surveys have shown that around 40 percent of dog owners don’t pick up their pet’s poop. They use excuses ranging from it being too much work to it not bothering anyone else. It’s time to think again! Here we list 12 important reasons for not leaving your dog’s poop in your yard.

1. Dog Poop Does Not Break Down

One of the main arguments for not collecting dog poop is that it is a natural product and will therefore break down by itself. Whilst this is true to some extent, dog waste can take up to a year to fully break down. During that time, it presents all of the hazards detailed here and doesn’t look too great either. Just because some other animal poop, such as horse manure, can be used as compost in your garden it does not mean that dog poop will have the same effect. Dog poop is acidic and destroys grass rather than enhances it. It is also very messy (and smelly) if it gets caught up in a lawn mower!

Dead grass of the nature background. a patch is caused by the destruction of fungus. Rhizoctonia Solani grass leaf change from green to dead brown in a circle lawn texture background dead dry grass.

Dog feces are acidic and can kill grass.

©SingjaiStocker/Shutterstock.com

2. It Pollutes the Environment

Your yard or garden does not exist in isolation. It is connected to all of the environment and delicate habitats surrounding your home. When it rains, anything in your yard gets washed away and enters the surrounding environment including watercourses such as streams and rivers. The phenomenon is called leaching. This causes a problem because dog poop is full of nitrogen and phosphorus. Both of these can trigger excessive plant and weed growth which robs the water of oxygen and kills aquatic life. It can also make recreational water unsuitable for humans to use.

Manistee River State Park Sunny Day Summer

Dog poop can contribute nitrogen and phosphorus to watercourse levels.

©Andrew Gibbs/iStock via Getty Images

3. Someone May Tread in It

You might be careful about where you tread in your yard, and you may know where your pooch likes to go potty most often. That does not necessarily apply to your visitors especially if they are children or other dogs. No one wants to see dog poop being dragged into their home on the bottoms of shoes or, even worse, on bare feet! If you have ever tried to remove dog poop from the soles of trainers or a hallway carpet then you will understand this.

Hiking on a Trail - Hiking Boots

Treading in dog poop is no fun!

©adriaticfoto/Shutterstock.com

4. Dog Poop Contains Harmful Bacteria and Viruses

The bacteria and viruses that can be present in dog poop are an immediate threat to anybody using your yard and to the wider population if it is washed into water courses. There is a long list of pathogens that can be found in dog poop. It includes salmonella, E. coli, Giardia and Leptospira. These are zoonotic infections which means that they can be passed from animals to humans. Recent studies have found that some of these organisms are antibiotic-resistant including a methicillin-resistant Staphylococcus aureus. It has been suggested that dog poop may have the potential to contribute to the spread of resistance genes in bacteria. Discarded poop presents a risk to any other dogs that come into your yard, as well as wildlife and birds. The pathogens can be leached into water in the same way as nitrogen and phosphorus and present a risk to human health.

Gram-positive bacteria

Some bacteria and viruses in dog waste can cause human diseases.

©iStock.com/Md Saiful Islam Khan

5. Dog Feces Smells Bad

Dog poop has a distinctive and unpleasant odor. This is caused by sulfur produced by bacteria in the dog’s intestine. Dogs on a low protein diet in particular can have very smelly poop. This is because the food is harder for their digestive system to break down and more sulfur is produced as part of the process. In some ways, it’s a good thing that dog poop smells because it helps us to know where it is! However, it can make your yard or garden an unpleasant place to be and your neighbors may also complain.

nose

The sulfur in dog waste makes it smell so bad.

©Asier Romero/Shutterstock.com

6. Not Picking Up Poop May Be Illegal

Many areas have bylaws that require you to clean up after your dog in public areas. Some neighborhood homeowner associations and neighborhood covenants also require you to pick up poop in your yard. In rented accommodation, this may be in your tenancy agreement. If you live in apartments with a shared garden, it is courteous to your fellow residents to clean up after your dog. No one wants to use a garden covered in dog poop.

an old man throws out a weed that was harvested from his garden

Some neighborhood covenants also require you to pick up poop in your yard.

©JohnAlexandr/iStock via Getty Images

7. It Can Encourage Vermin

Vermin, such as rats, in urban areas are not fussy about what they eat. Dog poop is high in fat, protein, and carbohydrates and that makes it an attractive food source for rats. They have an excellent sense of smell and will be able to locate the poop from some distance away. By leaving the poop in your yard, you are attracting rats to your home. Not only do these vermin carry disease, but they can also cause structural issues on your property by gnawing doors, windows, and even electric cables. The most effective way to determine firming is to remove all available food sources.

Black Rat

Rats are attracted to dog poop and they carry diseases.

©Ernie Cooper/Shutterstock.com

8. Your Dog May Eat It

Rats are not the only animals that like to eat dog poop – dogs like to do it as well! As disgusting as this may sound to us, it is a recognized canine behavior called coprophagia. Around one and six dogs are regular poop eaters and a quarter of dogs have tried it at least once. Both adults and puppies show this behavior but it is more common in multi-dog households and females. It is not a behavior that you should tolerate because it can lead to your dog eating feces produced by other dogs. This puts them at risk of contracting diseases. One of the main prevention strategies for coprophagia is removing poop as soon as they have deposited it. A lot of poop hanging around only encourages them!

Great Dane dog pooping

Many dogs will happily eat their poop.

©Victoria Rak/Shutterstock.com

9. Dog Poop Encourages Flies and Mosquitoes

Dog poop is an attractive food source for many flying insects including many species of flies and mosquitoes. These are not necessarily something that you want to encourage into your yard as they can also make their way into your home through open windows etc. Flies will lay their eggs in dog poop. These develop into larvae and eventually into a fresh generation of flies – right next to your house. The last thing you want is them landing on food in your kitchen!

Housefly

Poop doesn’t pose any serious threat to flies the way it does to humans.

©Eric Isselee/Shutterstock.com

10. Dog Poop Can Contain Parasites

Dogs can carry several gastrointestinal parasites. A large roundworm species, Toxocara canis, can be fatal and can also migrate to humans. Another species, Toxascaris leonina is more typically seen in older dogs. We can become infected if we put soil, sand, or plants that have been contaminated with dog poop in our mouths.

The hookworm species, Uncinaria stenocephala is found in the northern fringe of the United States, and less commonly elsewhere in the country. Another hookworm, Ancylostoma braziliense, is found occasionally from Florida to North Carolina and along the Gulf Coast of the United States. Humans can be infected if the larvae penetrate the skin. This usually happens when people sit or walk on contaminated ground with bare feet.

Dogs can also have whipworms (Trichuris vulpis) in their large intestine. They attach themselves firmly to the intestinal wall. The eggs pass out with the feces and infect other dogs. There are rare reports of human infections.

Tapeworm in intestine

Tapeworms can live in the digestive tract and related ducts of dogs.

©iStock.com/Artur Plawgo

11. Your Dog May Roll In It

There’s no denying that most dogs are attracted to stinky things. This may be because they are trying to cover up the fragrance of the shampoo you have just used (dogs don’t share human opinions of fragrances) or because they simply love stinky smells. Some experts have suggested that they used it as a camouflage for hunting so that prey did not know that they were coming. Others think that it was the method wild dogs used to carry messages about what they had found back to the pack. It may also be a method of territory marking or simply a way to get your attention. You are hardly likely to ignore your pooch doing this just before they run inside and leap on your sofa, are you?

One of the most effective ways to control this behavior is to reduce opportunities. You can achieve this by making sure that there is no poop in your yard!

A chow chow in a bath

Dogs who roll in poop need a bath!

©iStock.com/fotoedu

12. It’s an Opportunity for a Health Check

You’d be surprised by how much you can tell about your dog’s health by looking at their poop. So, instead of just ignoring it, go and pick it up and have a quick look whilst you are doing it.

The color is important. Dog poop should be chocolate brown and any other color can indicate a problem. For example, red streaks could be blood, and black tar-like poops can indicate upper gastrointestinal tract bleeding. Also check the shape which should look like a small log, small rounded poops can indicate dehydration. If your dog has diarrhea or watery poops it can also indicate that they have an infection. Finally, if there is mucus in the pool it can indicate an inflammation of the colon.

By removing the dog waste regularly, you will also be able to tell when your dog last pooped. If your dog does not poop for several days it can be a sign of constipation or an intestinal blockage.  

Dog poop should be chocolate brown.

©iStock.com/Amazing Nature Photography

NumberReason for picking up dog poop
1Dog poop does not break down like manure
2It pollutes the environment
3Someone may tread in It
4Dog poop contains harmful bacteria and viruses
5Dog feces smells bad
6Not picking up poop may be illegal
7It can encourage vermin
8Your dog may eat it
9Dog poop encourages flies and mosquitoes
10Dog poop can contain parasites
11Your dog may roll in it
12It’s an opportunity for a health check

The photo featured at the top of this post is © iStock.com/MrcTeamStock

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About the Author

Dr Sharon Parry is a writer at A-Z animals where her primary focus is on dogs, animal behavior, and research. Sharon holds a PhD from Leeds University, UK which she earned in 1998 and has been working as a science writer for the last 15 years. A resident of Wales, UK, Sharon loves taking care of her spaniel named Dexter and hiking around coastlines and mountains.

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