Swim? We've had both. Portia, a lab retriever cross and our (or at least my - I was very young when we got her) first dog was pretty much a "couldn't keep out of the water" dog. Misty, a blue merle mongrel, loved a swim in the sea and liked to fetch a ball from the sea - used to like taking her out on the north Norfolk coast.

Meg, a border collie, was of your "fuck off" to water type. She loved retrieving things though and wanted to do that in sheepdog style - crouch down somewhere and wait to round the object up.