If you aren't offering Softpaws for cats, you need to. They are a fantastic add-on that customers will love. They are easy to apply, come in nifty colors, and provide a great alternative to de-clawing.
How do you get the old Softpaws off? This is a question I've heard a lot recently. To get them off, simply snip the tips, about 2/3 of the way down (toward the nail quick) with a pair of cat-sized nail trimmers. This will leave a small band of acrylic nail cap still attached to the nail. This band is easily flicked off by using the edge of the nail trimmer or your own fingernail. Often times you will need to retrim the tip of the cat's nail once the cap is removed and you can see clearly where the quick is.
If it's too hard to remove the acrylic band, trim closer to the nail to remove more of the cap and then try flicking off what's left.
The whole process is very simple and should take only a minute or so to complete on all nails. New caps can then be reapplied to the freshly trimmed nails.
I've done a lot of Softpaw applications over the years, and customers love them. Even the male clients get into the whole manicure thing when I show them that they can have sports team colors nicely displayed on their cat's claws.
(for photos and more explicit instructions, check out the Ultimate Cat Groomers Encyclopedia. You can find it in the training materials section on the NCGIA website.)