
I have Irish Setters, and I use several different types of brush for different things.
I use one with a mixture of nylon and pure bristle for getting through the long feathering. A pure bristle one for getting a nice shine on the top coat, and a medium tooth comb for finishing. I'd really advise a grooming spray too, it helps to keep hair breakage to a minimum and helps protect the hair from dirt and grime, and an anti static spray just sprayed onto the brush to keep static under control.
I never used to use a slicker on Irish Setters, but my other breed is the American Cocker, and I have soft slickers for them. I tried one on my old Irish when he got covered in those little green sticky bud seed things one summer and found it amazing, so yes I like to keep a soft slicker handy.
As your boy gets older, you'll find he gets a bit sticky where urine spashes onto his feathering, so it's best to get into a routine of keeping his undercarriage clean as the urine weakens the hair too.
Dawn R.