My VERY favorite shampoo is Minksheen. I think it is beyond wonderful!
It last a long time too...it comes in a concentrated form, so you can dilute it with water. I just ordered a gallon of it yesterday! It has a wonderful scent too.
For conditioner I use Pek. It is quite pricey though...and you have to have a minimum order of like $75. But, it too will last a long time.
I've also used Vellus and like it. It smells AMAZING! And another one I've used I liked a lot was Chris Christensen.
I'd love to hear what others say. If there is something...anything...that helps with growth, I'm all for that!
Oh, you can add a tiny amount of oil to her food. That helps with keeping the skin from getting dry...it makes the hair shinier too. (Good oils would be salmon oil, coconut oil, anchovy oil....I'm sure there are others too.) I get an oil from my vet's office that I really like. It is omega 3 pet oil.