Because the word vampire usually carries an association of night time with it? [Duh?

Also because a) small horses are excellent and b)something in Alucard says that Jaskier would not appreciate suddenly seeing these things at full size. The good news is that because the horse isn't fully formed and it is a construct by Alucard, it does not try to get a nip of blood from Jaskier's fingers. Yet.]

Last one does not, although now you've wandered into what are vampires actually like where you're from, because Ciri keeps being surprised that I get annoyed at assumptions. And that I can embroider.

[Gonna just. Take a loooong sip.] This is very robust. I would have anticipated more tanins in it though, based on the name.