I cut the paps nails myself with guillotine clippers, maybe once a month.
Blaze gets his done more often than Minka because he's groomed more often for shows.
They don't get much of a chance to wear them down on concrete etc, as they prefer to run about on the grass when they're outside.
I only take off a tiny bit at a time because they hate it so much (trying to get their head between me and their paw and trying to wriggle their paw away).