[QUOTE=S1969;7457052]
I like guillotine cutters; I cut at an angle, and then go around the nail to “round off” all the angles. I very rarely just cut off the excess nail; not only does it leave a squared off nail (which is sharp, and unsightly) but I never like to put the whole nail through the hole of the guillotine in case the dog pulls back. If you keep up with trimming, you shouldn’t have to deal with long, thick, tough nails…but of course we’re all human. I try to keep my old guy’s nails short enough that I only have to deal with thick + tough. 
I also use a Dremel; I can use just the Dremel, but I prefer to use the guillotine clippers and then the Dremel to do the finish work for all my dogs…but everyone has their own preference.
Very rarely do dogs truly trim back their nails evenly, so even if they do a good job on some nails, they don’t on others - e.g. I trimmed a friend’s dog’s gnarly dew claws today, as well as a Peke that had one long nail on every foot.
So, I would definitely recommend practicing with all your dogs, even if all you do is smooth them and make them pretty because there usually are some nails that don’t wear properly - even if your dog is generally good at wearing them down.[/QUOTE]
The problem is that his two side nails grow at the same thickness from base to tip with no taper, and they curve straight down. Even when they are as short as they can be, it’s almost impossible to get the cutters around them because the nail is against the pad.
His sister has a self-pedicure session every day. I take a clippers to a stray nail about once a year. She does a pretty good job on her own. 