Okay so we are taking Piper out tomorrow to the Austin Ice Cream Festival. She is in need of a trim anyway, but I want to give her one to cool her off more. She's never been groomed and I called around and nobody has any availability within my time range. My husband has one of those adjustable trimmers, basically the exact same I've seen for dogs. Any tips on how we should do it, areas to avoid, or what number to use on her? I'm looking up videos too, but figured I'd ask the experts