I use Duurstede shampoo and conditioner on my dogs. I also use the Duurstede revitalizer. For brushing I use Miracle Coat and I use a little Fantastic anti-static spray for show days. . Just because your shampoo has a lot of suds doesn't mean it's a good shampoo. I'm a hairdresser, so I know a lot about hair.
Suds leave a residue on the shaft and cuts down on the shine.
This article is on the Duurstede web site. The ph is very important. People are 5.5 ph which is much more acidic than dogs which are 7.0. Using shampoo that's less than 7.0, which is alkaline, can cause the hair to dry out and look fried over a period of time. . Something to watch out for in conditioners is, if they have any wax in them.