[Giant wolves, mythical horses, or whatever else — it sounds like a campfire story, which, yeah, he now realizes was Vrenille's point. But Zoro isn't one to lose sleep over fairytales. If the big guy is frustrated about his pet project, that sounds like his own problem.

As for the more practical matters...]

Whatever you've got. [A hint of sardonicism briefly crosses his face.] Probably beats jail rations.

[Sleep, booze, food, and training — those were the necessities. Confinement isn't going to stop him from staying in shape.]

Mornings and evenings, yeah. [There's a steely glint in his eye.] Always found ways to stay sharp, even in here. Fancy equipment's just a bonus.