Severus is not going to pet the lemur, but not because he worries for his fingers - it's perfectly nice, if a bit curious about Charles now - it's just that he's not a cat person or a dog person. He's an 'Oh my god it's shedding, get it the fuck away from me' person.

"Yes, it will. Transfiguration isn't always meant to be permanent, and the more disparate one thing is from the other, the more it will 'want' to turn back. Creating mimicry of life like this is incredibly complicated. After a few hours it'll start wanting to be a shoe very much. Probably sit on your feet, maybe look a little leathery. Then it'll just be a shoe again."