Get all of the brown sheep that you can find, and then you’ll have to grab a black one and drag it in the water and hope that it’s brown. Though, I do think everything is a little bit random. After that is complete you have to get gold medals on this. It is the most time consuming and hard challenge because of how random it is. You may run out of time bringing your last one in, or could even have 40 seconds over all depending on where the sheep are. First off, hit at a good rate so that you are always going fast but not fatiuged. Always get the white sheep last, as they only give you 5 seconds added. When you encounter a black sheep, do not wash it, as it gives you 10 seconds (as well as the brown). If you wash it and it's white, you'll only get 5 seconds. Just by saving all sheep you will get a gold medal.