Normal shedding vs. hair loss at a glance
| Sign | Normal shedding | See a vet |
|---|---|---|
| Pattern | Even, all over the body | Patches, thinning spots, or symmetrical loss on both sides |
| Skin underneath | Normal color, no bumps | Red, dark, flaky, scabbed, thickened or smelly |
| Timing | Heavier in spring and fall; steady year-round for indoor dogs | Sudden, or steadily getting worse regardless of season |
| Behavior | Unbothered | Scratching, licking, chewing or rubbing one area |
| Coat quality | Glossy, full when you part it | Dull, brittle, greasy, or you can see skin through it |
| Other changes | None | Weight change, thirst, low energy, appetite change |
What normal shedding looks like
Every hair follows a growth cycle, and dogs release the old hair as new hair comes in. Double-coated breeds "blow" their undercoat twice a year in dramatic clumps (see fall shedding season), while indoor dogs under artificial light shed a steady amount all year. Puppies swap their baby coat between roughly 4 and 12 months (puppy coat timeline). In all of these, if you part the fur the skin looks normal and the coat looks full.
Red flags that mean it's not just shedding
- Bald spots or thinning you can see from across the room
- Hair loss in the same place on both sides of the body (often hormonal)
- Red, inflamed, crusty or darkened skin; a musty or yeasty smell
- Constant scratching, licking or chewing at one area
- Coat change alongside weight gain, increased thirst or lethargy
- Small black specks or visible fleas at the base of the tail
What vets commonly look for
We're a grooming brand, not a clinic, so this is orientation, not diagnosis. Hair loss in dogs is commonly traced to parasites (fleas, mites), allergies (environmental or food), skin infections (bacterial or yeast), hormonal conditions such as thyroid or adrenal problems, and less often nutrition or stress. Cornell's Riney Canine Health Center has owner-level explainers on canine skin and coat conditions, and the ASPCA's common dog diseases page covers the parasites and allergies that most often show up as hair loss. A vet will usually start with a skin scrape or flea check, and blood work if the pattern looks hormonal.
Cats too
The same logic applies: even shedding is normal (why is my cat shedding so much?), but bald bellies, thinning flanks or scabby skin point to over-grooming, parasites or allergy. Cornell's Feline Health Center covers feline skin diseases in owner language.
If it IS just shedding: the routine that keeps it off your floor
Normal shedding doesn't need a vet, it needs a schedule. A gentle deshedding glove for 10 minutes a day during coat-blow weeks (and a couple of times a week otherwise) removes loose hair before it lands — while giving you a daily hands-on skin check that catches the red flags above early. Full plan: how to reduce dog shedding. One rule: never scrub one spot repeatedly with any tool; that irritation can itself cause a thin patch.
Daily coat check + fur catcher — Furly Deshedding Glove ($24.99) →
Shedding vs. hair loss FAQs
Is it normal for a dog to shed in clumps?
Yes for double-coated breeds during spring and fall coat blow — tufts of soft undercoat come out in handfuls, but the skin underneath looks normal and the coat still looks full. Clumps that leave bare or red skin behind are not normal shedding.
Can stress cause hair loss in dogs?
It can contribute — stressed dogs may over-lick or chew one area, and some shed more after a stressful event like a move or a vet visit. Persistent patches still deserve a vet check, because stress and a skin problem often overlap.
Can a deshedding glove cause bald spots?
Used gently over the whole body, no — a glove only lifts hair that is already loose. Repeatedly working one spot with any tool can irritate the skin, so keep strokes light and moving.