Ive used all the styles of trimmers and definitely the guillotine style are the best. If the nail starts to curve too much then I would use the small cat clippers. Hilton absolutely hates having her nails cut and rightly so, she pulled one time when I was cutting, I panicked and cut her "quick" and she bled a lot. If its to the point where you don't think you can do it, take her in for sure.
"...it can't rain all the time ..."