Undercoat brush vs. regular brush: What's the difference, and who needs what?

If you've ever stood in a pet store wondering which brush you actually need, you're in good company. "Regular brush" and "undercoat brush" sound similar – but they do completely different jobs. Here's a simple, expert-friendly guide to help you choose correctly (and reduce shedding at the same time).

A comparison image makes it much easier to understand the difference.

First: What is undercoat, and why does your dog shed?

Many dogs have two layers of fur: guard hairs (outer layer) and undercoat (inner layer). The undercoat acts as insulation, and it's often what sheds in large quantities when the seasons change. This is why many experience extra shedding in the spring and autumn.

Signs your dog has an undercoat

The fur feels dense and “puffy” near the skin
A lot of hair comes out when you stroke the fur
Shedding increases significantly during certain periods
You find "clumps" of loose hair on the floor

Regular brush: what it does well

By "regular brush," we typically mean a soft brush, pin brush, or a combination brush. It's great for daily maintenance, shine, and picking up loose hairs already on the surface.

When a regular brush is enough

Your dog has little to no undercoat
You want to keep the fur neat between "deeper" grooming sessions
You need a gentle tool for frequent brushing

Pro-tip: A regular brush is perfect as a "finish" after an undercoat brushing session.

Undercoat brush: what it does differently

An undercoat brush is designed to reach deep into the coat and remove loose undercoat. This is the type of hair that often causes significant shedding – and which a regular brush doesn't always effectively remove.

This is the "job" an undercoat brush does

Removes loose undercoat that causes shedding
Can make the coat airier and easier to maintain
Helps especially during shedding seasons

Important: an undercoat brush = effective (so use it correctly)

Precisely because it's effective, you should use it with light pressure and short sessions. Too often or too hard can irritate the skin and make the coat look dull.

Who needs what? (a quick guide)

If your goal is less shedding: You often need an undercoat brush (if the dog has an undercoat).
If your goal is consistent maintenance and shine: A regular brush might be enough.

You likely need an undercoat brush if…

Your dog sheds a lot seasonally (spring/autumn)
The coat is dense and the undercoat builds up
You notice that a regular brush isn't "doing enough"

A regular brush might be enough if…

Your dog has little/no undercoat
You brush often and want a gentle tool
You primarily want to keep the coat neat between sessions

Short-haired vs. long-haired: what should you choose?

When looking at undercoat brushes like Furminator, it's important to choose the variant based on coat length. Not because short or long fur is "better" – but because they are designed for slightly different needs.

Short-haired coat

Choose the Furminator for short coats if your dog has an undercoat and sheds a lot. Use light pressure and short sessions – short-haired coats often require less time.

Long-haired coat

Choose the Furminator for long coats for long-haired dogs. Untangle mats with a comb first, and use the undercoat brush for maintenance to prevent undercoat from turning into mats.

A simple "grooming kit" (that covers 90% of needs)

Want to keep it simple? This is a smart combination:

Undercoat brush (e.g., Furminator) – for shedding/undercoat
Comb – for tangles (especially long-haired)
Regular brush – for finish and consistent maintenance

Bonus: 1–2 short sessions a week during shedding season often yield better results than one long session occasionally.

Mini-FAQ

How do I know if my dog has an undercoat?

If your dog sheds a lot seasonally and the fur feels dense near the skin, it's often an undercoat. A brushing session that produces "clumps" of hair is also a typical sign.

How often should I use an undercoat brush?

As a rule of thumb: 1–2 times a week during shedding periods (5–10 min), and otherwise as needed. Use light pressure and keep the session short.

Is an undercoat brush a "tangle remover"?

It's best for loose undercoat that can contribute to tangles. Hard mats should be untangled with a comb first, especially on long-haired coats.