Hmmm......funny, the Coal Tar shampoo leaves mine soft and silky, never had skin issues with any dogs . Maybe depends on the breed of dog. With Coal Tar, I don't need a conditiner. Could be the raw feeding, their fur is always sleek and shiny and no smell unless they roll in something.
My friend is a groomer and she also agrees with too much bathig being harmful. She finds people bringing their dogs in once a month is too much, she only does hers 3-4 times a year. I guess if mine got dirty or smelled I would bathe every week , but they never really need it.