If you decide to go with a dremel, I highly recommend you purchase the Safeguard from Peticure. It is worth every penny!
The first time I tried a dremel, it caught my poor Cavalier's slippers in the head. With the Peticure Safe Guard, I have never caught a single hair. I use the Safeguard with a variable speed dremel. It works great! I did not buy the Peticure grinder, just the guard. I was told that the grinder doesn't have enough power and the battery doesn't last long.
J. and pups, Gem, Monty, Harley and Sapphire