Breath of the Nundu

[HG/SS] AU/Crackfic: One morning, Severus Snape wakes up with a furry visitor snuggled under the quilt with him. As he pulls back the quilt, two glowing eyes lock with his, and everything is turned on its ear. As the rest of his visitor crawls out from under the covers, he realises he has a problem. There is a Nundu cub in his bed, and for some reason, she's bound to him.