My Lucille is a little over a year old and she does have problematic, dry skin. I switched her food to orijen and it seems better. But after her last grooming appointment (about a month ago) I've noticed her fur became dry and it doesn't grow

the hair on her head even frizzes a little and breaks.....
I can't figure out what it might be.
Should I give her some kind of vitamins? Or maybe just fish/salmon oil on her food? What could it be?
Please, any advice will help!
Thanks.