I have a 12yr old Chihuahua who desperately needs her nails trimmed. I'm too scared I'd hurt her. She's mostly blind n deaf but she is so sweet. She's dealing with cancer as well. I've had her her whole life. Please if someone can find it in their hearts to help us. Her mommy left us over a year ago so it's just been her n I n I do my best for her. Just need a little help please.