Looks like a goat at first glance, but this recently-born fawn appears to be a pretty dramatic example of a piebald deer.
Uploading an observation from last October of a piebald deer fawn. This year, a MUCH more dramatically white fawn has appeared in our yard (see here: https://www.inaturalist.org/observations/231441868)
One individual powering through the crest of a breaking wave and another one diving through it. It's always fun to watch these ducks handle such varied surf conditions.