I have raised springers for years unfornatly I don't have one now,but I willtry to answer your questions. Maybe some of the groomers here can answer with better tips but this is what I do.
Feet I just use nose hair sissors and trimmed the hair even with the pad. I leave the hair in side cuz I know how short hair itches. Ears I shaved the ear underneath to about a third of the length. leaving the lovely long ears. The rear feathers never had that problem but maybe trim around her outer gental area fo keep it shorter.