He swished his wand around over his head like a lasso, refreshing ventilation charms to eliminate the worst of the fumes. Such spells were designed to aid human senses, though, not lycan ones, so he had no idea if they were quite enough. Still, it was the best he could do to see to the comfort of his guest.
That done he made his way back to the front of the shop were a small table and a few chairs sat for the use of customers who were waiting attendance.
"A batch of Blood Replenishing Potion," he answered. It wasn't as though it was a particularly intrusive question.
"Have a seat. Are you here to discuss the Wolfsbane?" Severus sincerely hoped so. It would be a fine thing to focus on something so challenging to distract his thoughts. "I'll be starting this month's batch tomorrow. You have my word on my reputation as a Potions Master that this round will be a tremendous improvement over the last."