This has to be confusing to the deer. Does the deer know that the Golden isn’t a wolf anymore?
He’s probably thinking “heck! I’m drowning and here comes a wolf! Oh, he brought me to shore now is my chance to run! Wait now he’s tasting me? I don’t know what’s going on right now”
The deer was completely disorientated, had no idea what was going on. It actually ran back into the water after the dog brought it back onto land and the dog's owner had to jump in to rescue it again.