i have a cocker bitch who has turned 12 months and has come on well of retrieving a bushing however she doesnt like the water as she will go in to fetch sticks/the dummy but only where she can touch the floor but as soon as she can not feel the floor under her feet she turns around and will not go back in for a good 5/10 minutes and will do the same again. Any advice on how to get her comfortable in the water??