Adult Coat: Still soft but more dull vs. shiny and ends seem frizzy/frayed??

[Luna Labradoodle]

Our Luna came to us with a beautiful glossy dark black coat at 4 months old, and now at 10 months old and well into/nearing the end of the puppy/adult coat transition she has very little gloss and is just in generally more dull (I would say 'matte' but I don't mean knotted!) and her coat looks more frizzy/frayed on her back and sides.  I'm wondering exactly what I should attribute this to so I can work to get that beautiful gloss to her coat again.  I should note that she's still insanely soft, so the texture of her fleecy coat hasn't changed its just the sheen is gone.  And also of note is that I keep her coat a shaggy 4", she's never been shaved or clipped, always scissor cut. 

Is this more likely due to her food/nutrition?  I don't currently give supplements but maybe she needs one.  Maybe she needs a new brand of food?

Or Is it her grooming (cut & condition)?  I just use the little thin beauty parlor scissors I use for my son's hair, but perhaps the blades are making her ends fray/frizz?  I have tried using both a lotion-like leave-in conditioner and a lighter spray leave-in and both seem to keep her nice and soft but do nothing for the sheen.  Or maybe I'm not doing it enough, she gets sprayed at least once or twice a week and brushed every couple of days.  I haven't invested in a Les Pooch brush yet, but she's not matted so I thought we were doing okay with the brushes from the pet store.

Thanks for any help/tips/advice you can offer!!

[Michelle Motorola]

is an advantage to shedding mean that he doesnt get mattes?

[Karen, Jasper and Jackdoodle]

Yep; no matts, ever.

But I'd rather have the matts than the shedding.

[Michelle Motorola]

I had a golden retreiver growing up, and we could never wear black! 

So far Chloe is shedding a bit into the brush only. I am totally okay with that!. But then again she is only 4 months old

[Erin & Stella]

What is EPO?

[Karen, Jasper and Jackdoodle]

Evening Primrose Oil. Richest source of gammalinoleic acid, an essential fatty acid.

Human supplement, 500 mg softgels.

[Carolyn Shusterman]

When Hershey's hair was 4 to 6 inches long the ends looked dull.  My hairdress gave me a bottle of One'n only ARGAN OIL for instant shine, smoothness, Friz control and color protection.  I put a few drops in the palm of my hands and rubbed it into the ends of Hershey's hair.  Looked and smelled GREAT.  This product can be purchased in beauty supply shops.  GREAT for our hair also!!