What is the purpose of having two different sides on the brush?

The fine-teeth side targets smaller tangles, surface dirt, and loose hair close to the skin. The coarse-teeth side handles larger mats and thicker sections of fur. Switching sides within a single session lets you do a full groom without picking up a second tool.

Will the teeth scratch my dog's skin?

The teeth on both sides are designed to move through the coat rather than scrape the skin. Even so, gentle pressure is recommended, particularly on the fine-tooth side near sensitive areas like the belly and behind the ears.

Does this work on cats too?

Yes — the brush is listed as suitable for both dogs and cats. The dual-sided design works across different coat textures common in both species.

How does it help with shedding specifically?

The coarse-teeth side pulls out loose undercoat hair that hasn't fallen naturally yet. Removing that layer before it ends up on furniture is the primary shedding-reduction mechanism — it doesn't stop shedding, but concentrates it to one grooming session.