A separate scratcher can complement a cat tree when it gives your cat a better surface, orientation or location for scratching. A tower may include short posts that are useful for climbing but do not provide the uninterrupted stretch your cat prefers. Alternatively, the cat may favour horizontal scratching or a place near its usual sleeping area. Observe those habits before choosing another item. Compare the scratcher's usable area and stability, and place it where the cat can use it without colliding with a bed or walkway.
In a multi-cat home, a separate location can also make scratching available without approaching an occupied tower. Keep the tree's scratching surfaces maintained even if you add another option. An extra product is worthwhile when it solves a clear practical gap; it is less useful if it repeats the same unsuitable texture or awkward position that the cat already avoids.
The Sisal Pair’s two 80 × 50 cm mats can provide a different orientation from a tower’s posts. By contrast, the Full Stretch post is listed for cats under 5 kg, so it is not a default add-on for a heavier Maine Coon.
For product comparisons alongside this advice, see Sisal Pair scratching mats and Paw-Villian cardboard scratcher. The details below explain their sizes and uses.
Further reading: rspca.org.uk; battersea.org.uk; giantpaws.co.uk.
Sisal Pair scratching mats
Paw-Villian cardboard scratcher