Hi Irene,
I use the 15 to 1 Coathandlers Shampoo and 15 to 1 Conditioner for the gang (10 dogs). I buy the gallon jugs with the pump and it will last me a year. I bought 2 plastic sqeeze bottles and put in one part shampoo with 15 parts water for both the shampoo and conditioner. I have tried a couple of different brands but am very happy with this product, especially the rinse. I also love that I can use this on their face and it will not hurt their eyes which is especially helpful with eye boogers.