Jenny doesn't like it at all, she becomes all scared. If i want her to swim with me, the easiest way is to go to the beach on a hot day, walk for a while and she will get hot ( being black, duh ) than, she will go in the water to cool off ( she's not dumb, eh? ). If I'm not fast enough to get in the water while she's in, all i have to do is get her confidence up. Bear with me, this is hard to explain.

In steps:

1: throw in a stick about a foot into the water, so she can still reach it from shore.

2: when she returns with it ( if she fetches ) reward her with a quick pat.

3: throw the stick back in the water about half a foot further each time, rewarding when she returns. Obviously, eventually she won't be able to reach it from shore so she'll have to take a step into the water. Each time as the stick gets farther, she will have to swim deeper. but she doesn't mind if you do it in steps.

( this works with my girl, who is fetch-oriented it might not work if they don't like fetch, i suggest doing it 1 by 1 so that they aren't destracted by the other dog )

The strange thing is, with my girl who hates water won't mind it if you take small steps deeper, like above. Example: if you throw a stick out into the lake 20 ft she won't go get it, but if you throw it 1 foot at a time, she'll go get it even when it's 20 ft.

I don't get it, is this lack of confidence?

Like I said, this works really well for me. Try it see if it works for you. Good luck and i hope it works !