you can do it with regular finger nail clippers or reptile clippers.you just clip them, but you have to be very careful of the red vein in their nails, b/c if you hit that, it will hurt very badly.
Brokenwings":1oymn67m said:^ with grout of tight-together tiles only!
If you are scared of clippers, use Peti File. A little grinder, mines just sits there as I bump and touch the grinder on the tips.