Dr Bronner Castile Soap Dilution Ratio For Dogs. (120 ml) for a large load. You can use liquid castile soap for that too, here are the dilutions.
For dilution directions, see dr. Simply stir gently and then wait about 1 minute for the soap to mix into the water. However, you should not let the oil or castile soap get in your dog’s eyes or let them ingest it (ie lick or eat the oils or soaps).