My first Rottie didn't care much for the water at first, but our older dog loved it and eventually Cheyenne followed because she didn't want to miss out on any of the action, also after great coaxing and me being in the water she would swim out to me and right back just to make sure the solid ground was still there,
after about 4 or 5 times out she finally realized how fun it could be,
now we can't get her out of the water