Grooming and coat
Why is my dog shedding so much right now?
Last updated 23 September 2026 · How we write and check this
Short answer
Sudden heavy shedding is most often a seasonal coat blow, which can last two to four weeks, especially in spring and autumn. Stress, a recent illness, poor nutrition, or hormonal changes can also increase shedding, so if the extra hair loss continues past a month or comes with bald patches, a vet visit is worthwhile.
The most likely explanation first
If the timing lines up with spring or autumn and your dog has a double or thick coat, a seasonal blow is by far the most common cause, and daily brushing during this two to four week window usually brings the visible amount of loose hair down quickly.
Other everyday triggers
A recent stressful event, such as a house move, a new pet in the home, or a stay in kennels, can trigger a temporary increase in shedding a few weeks later, since stress affects the hair growth cycle. A change in diet, particularly one lower in quality fats, can also make a coat shed more than usual over several weeks.
When it is worth a vet visit
Shedding that seems excessive well outside the usual seasonal window, that continues for more than four to six weeks without easing, or that leaves visible thin or bald patches rather than an evenly thinner coat, can point to a hormonal or nutritional issue that a vet should investigate.
Key takeaways
- A seasonal coat blow, lasting two to four weeks, is the most common cause of a sudden shedding increase.
- Stress and diet changes can also temporarily increase how much a dog sheds.
- Shedding that continues past four to six weeks or leaves bald patches is worth a vet visit.