I have never had mine done. Having said that I have just checked them just to be sure I hadn't missed anything.
They do go in and out, not so much out these days, spend most of their time sleeping!!!!!
Mine are 8, 13, 16, 17, 18 and 20 years old.
I do find nails on the floor quite often, well the shell of the nail, if you know what I mean.