Why is my dog suddenly losing lots of fur? | arlo.® Atlas
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Overview
If your dog is suddenly losing lots of fur, it could be normal seasonal shedding, but it can also happen with skin irritation, parasites, stress, allergies or coat changes linked to health issues. The key is to look at how the fur loss is happening and whether your dog’s skin looks sore, patchy or itchy.
Things To Check
1. Check whether the fur loss is all over the body or only in one area.
2. Look closely for redness, flaky skin, scabs, bald patches, broken hair or sore spots.
3. See if your dog is scratching, licking, chewing or rubbing more than usual.
4. Check for fleas, flea dirt or other visible parasites, especially around the rump, belly and neck.
5. Think about any recent changes in food, shampoo, bedding, flea control, home routine or stress.
6. Notice whether the coat is generally thinning, coming out in clumps, or shedding alongside smell, dandruff or oily skin.
7. Check if there are any other signs such as tiredness, weight change or reduced appetite.
Common Causes
The most common reason is ordinary shedding, especially when dogs change coat with the seasons. Grooming can also bring out loose fur that was already ready to come away.
Skin irritation is another common cause. This may be linked to fleas, allergies, contact irritation, washing products or a reaction to something in the environment.
Some dogs lose fur because they are licking or scratching an area repeatedly, which can make the coat look thin or patchy.
Less commonly, coat loss can be linked to hormonal or other health issues. These usually come with other changes as well as the fur loss itself.
What To Do
Start by observing the pattern for a few days if your dog otherwise seems well. Make a note of where the fur loss is, how quickly it’s changing and whether there’s itching or skin redness.
Brush your dog regularly with a grooming routine that suits their coat, as this can help remove loose hair and let you spot skin problems early.
Keep an eye on flea control and check bedding, collars and harness areas for signs of rubbing or irritation.
If you’ve recently changed shampoo, food or washing routine, consider whether the timing matches the fur loss. Stick to one sensible change at a time so it’s easier to tell what helps.
If the coat loss is mild and your dog seems comfortable, short-term monitoring is often reasonable. If it’s spreading, your dog is uncomfortable, or there are other signs alongside it, get veterinary advice.
Products That May Help
Gentle grooming and coat-care basics can help support a sensible home routine while you keep track of what’s going on with your dog’s coat and skin.
Related Questions
Why is my dog shedding more than usual in one season?
Should I worry if my dog has bald patches?
What can I do at home if my dog is scratching and losing fur?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.