Woodsorrel explains helpfully.
SORREL: Sure they do! I'm YOUR familiar, after all! Therefore, druids DO have familiars.

Clover looks skeptical. Sorrel hops down from her shoulder, transforming into a deer as she does so.
CLOVER: Fair enough.
SORREL: So why are we just standing here?
SORREL: Where are we going?

Clover looks apprehensive.
CLOVER: I was just trying to figure that out.
CLOVER: I want this journey to MEAN something, but...

Sorrel, fully deer-formed except for her bushy squirrel tail, looks back at Clover as they walk down the wooded path.
SORREL: Now you're wondering about how to make SURE it's meaningful.
CLOVER: Yeah.