I bathe them when needed(BCs have teflon coats so thats not often) and I use a shampoo make I made myself, basicly a mix of dish soap, any pro-V conditioner, rasberry bath milk, a little human shampoo, diluted in water. it works great, the pro-v conditioner fixes any damaged hair plus makes the coat easy to brush, and the dogs come out smelling like rasberrys my moms dogs get around 2 baths a year, my girls are a little more adventurous so they need a little more, basicly if they roll is something stinky, or go swimming in the creek they get a bath, mud is no reason for a bath for a BC, if its sunny I just tie them out of the deck(to keep them out of more mud) and let the sun dry up the mud, when the mud is dry it will just fall off and the gals will look like they just came home from a groomers lol if its not sunny, I just crate them till the mud dries.