One of mine likes to swim and one of them hates it. My little Maddie really likes the lake but she doesn't spend all that much time swimming she jumps in and then gets right back out.
I let her swim, but only supervised, I have heard of alot of yorkie drownings so I am always extra careful. Copper hates the water, he fell in a pool once durring a play date and now he wants nothing to do with the water. i think it is really cute that your baby likes it.