Fleas are small creatures but can cause serious discomfort and health problems for your dog. Whether it is a shaggy Pug, drooling Bull Mastiff or plucky Butcher, it doesn’t matter, fleas don’t discriminate and will gladly ride on any breed, age or size.
In the UK the mild & damp climate makes fleas a year-round problem for most dogs. Flea’s infestations are very common and can become a serious issue. At our Southampton vet clinic we spot them regularly on our furry patients. How do you know if your dog has fleas and what can you do about it?
Check out our detailed guide:
What Do Fleas on Dogs Look Like?
Fleas are insects that do not have wings, they are ectoparasitic in nature (~ 1–2 mm in length) and are reddish-brown in colour. As fast movers & jumpers, they are not easy to see at a first glance. Smaller infastations can be missed but you should be able to observe flea dirt (small black specks on your dog’s skin) that look like black pepper or ground pepper. They turn red when put on a moist tissue, as flea dirt is just dried blood.
How to Check for Fleas in Dogs?
To check for fleas in dogs, follow the below procedure:
- Use a flea comb on your dog’s back, belly and neck.
- Pay extra attention near the base of the tail, in the armpits and near the groin, fleas like to hide in warm and moist places.
- Inspect your dog’s bedding, too.
- Closely watch itching, biting, or restlessness in your dog, especially at night.
If you see just one or two fleas, you may have a much bigger problem on your hands, a female can lay 50 eggs a day.
Where Do Fleas Live on Dogs?
Fleas are clever little hiders. Common areas on dogs include:
- Around the tail and lower back
- Under the collar
- Between the toes
- Around the belly and inner thighs
They tend to settle in places that are hard for dogs to reach with a scratch or nibble.
Where Do Dogs Get Fleas From in the UK?
You may have considered your dog safe from fleas if they are primarily an indoor pup or see little interaction with other animals, but do you know that fleas are extremely opportunistic and durable parasites. Due to the UK’s mild climate and a number of other ways your dog can actually pick them up .without you even noticing.
Now, here’s a closer look at some of the common places from where your dog might catch up the fleas:
Outdoor Environments (Grass, Parks, and Woodlands)
Fleas don’t live only on animals—they can survive in the environment, particularly in shady, moist places like:
- Grassy areas
- Woodland undergrowth
- Leaf piles
- Sand or soil
Places where you take your dog for a walk — like Southampton Common, the New Forest, or even your own garden — can pose a risk. If a flea is hungry and your dog walks through the same area, the flea can jump on them within seconds. Fleas can lurk in a larval state for weeks, waiting for a warm body to pass by.“
Wildlife
Urban and rural wildlife in the UK often carry fleas, including:
- Foxes
- Hedgehogs
- Rats and mice
- Squirrels
- Birds
Your dog can use the same areas during the day time and pick the fleas that came off the wildlife during their night adventures.
Other Pets (Dogs and Cats)
Fleas are not species-specific – so if your dog plays with another dog or even meets a cat with fleas, the pests can easily transfer hosts. Shared spaces like:
- Dog parks
- Kennels or boarding facilities
- Grooming salons
- Doggy daycare
They all pose a risk, especially if one animal is infested. Fleas jump between animals during play or close contact, and even brief exposure can be enough.
Your Own Home and Garden
Once fleas get inside your home, they multiply quickly. A single flea can lay up to 50 eggs per day, and these eggs fall into your:
- Carpets
- Pet bedding
- Sofas
- Cracks in wooden floors
Can Fleas Make Dogs Sick?
The answer is, yes — all dogs (not just puppies). Not only will fleas cause your dog to scratch like crazy, but they can also cause really serious health problems:
Flea Allergy Dermatitis (FAD): A very frequent allergic reaction that leads to excessive scratching, alopecia and skin infections.
Anaemia: Loss of a significant amount of blood can lead to anaemia in dogs, particularly small young animals.
Tapeworms: If your dog happens to ingest a flea while licking itself to groom, it can lead to a tapeworm infection.
Hot spots and bacterial infections: If dogs scratch too much, they can have wounds and skin infections.
Fleas can certainly make dogs sick—and in multiple ways!
How Common Are Fleas in Dogs?
Fleas are very common in the UK, even throughout winter when we have the luxury of centrally heated homes. If they are not being treated on the regular basis, there is a good chance your dog will get fleas. Not even the dogs that hardly ever leave the home are safe.
Can Fleas from Dogs Get on Humans?
Unfortunately, yes. If your dog sleeps on your bed or lies on the sofa, it is highly likely that fleas will jump from your dog to you. Itchy red bites are common on humans, often on the ankles or the legs. Fleas do not generally dwell on people, but they will bite if they get the opportunity.
Will Dog Fleas Live in Human Hair?
Not usually. Dog fleas love dogs, so while a dog flea may hitch a wild ride into the human hair it will not stick around. The human scalp is not their preferred environment. However, in a bad home infestation, they could be jumping all over soft furnishings, the carpet — and you.
How often should you give a Flea treatment to a Dog?
Prevention is key, depending on the product and their lifestyle, dogs should be given flea treatment monthly.
Treatment options include:
Spot-on treatments: Applied to back of neck
Tablets: This includes tablets that act in half an hour and protect your dog for a long time.
Flea collars: They also work for a few months and are best suited for dogs with a lower risk of infestation.
Flea sprays or shampoos: Provide temporary relief, not a long-term prevention solution
Remember—Some OTC medications are hit-or-miss. Talk to your vet about the best thing for your dog. There are large studies showing resistances to OTC flea products which can often give you a false security.
Treating the Environment
Did you know? 95% of the flea life cycle occurs OFF your dog. Fleas lay their eggs and they go and fall onto your carpets and furniture and bedding. To break the cycle:
- Wash your dog’s bedding regularly at 60°C
- Vacuum daily—especially near skirting boards, under furniture, and in corners
- Empty your vacuum bin or bag immediately after each use
Flea infestations can take weeks to fully resolve—persistence is essential.
FAQs: Fleas in Dogs
Q1: How often should I flea my dog in the UK?
While most flea treatments for dogs only provide protection every 4 weeks, many of the products available can last up to 12 weeks! Your veterinarian can suggest the ideal schedule.
Q2: Where do fleas hide on dogs?
Fleas hide in warm dark areas—around the tail, groin, belly, armpits, ears, and under the collar.
Q3: Can fleas live in human hair?
It’s rare, but possible temporarily. But they will not linger—dogs are their choice.
Q4: Are fleas more common in summer?
However, if your homes are centrally heated, they can live and breed indoors throughout the year.
Q5: Can my dog get fleas from walking in the park?
Yes! Fleas can survive in grass, soil and other pets your dog might contact.
Q6: Are natural remedies effective?
Treatments that have been approved by a vet in Southampton are the safest and most effective option.
Final Thoughts
Fleas are not just a summer issue, or something that only puppies deal with. They can occur with any dog in any house at any age. Identifying the signs, taking fast action, and stopping future outbreaks supports a healthy happy (and itch free) dog.
If you have any doubts as to whether your dog has fleas, or are having trouble getting on top of an infestation then we can help. We provide a solution, whether it is a professional flea check, a complete treatment plan, or a piece of advice depending on your dog’s health.