keep an eye on the nails …
Fit, healthy cats that spend a lot of time outside generally naturally wear down their claws sufficiently.
However, indoor or elderly cats may need to have their claws trimmed regularly. Also, some cats have an extra toe (polydactyl) which doesn’t touch the ground (just like the normal dew claw) and may overgrow. If overgrown claws aren’t trimmed they can grow inwards into the pad and can be painful, and become infected.