Mr Stott said the lamb definitely had "the cute factor" which seemed to attract a lot of welcome attention from female students in the street.
But as with all good things, there was a price to pay.
"The down side is, he wakes us up about 7am every morning, bleating to be fed.
"The boys aren't too fussed on getting up that early - it's not part of a student's life."
At the moment, Buster takes pride of place in a special pen in a warm corner of the living room, but the flatmates agree his rapidly growing frame will soon make it difficult to keep him there.
Mr Stott said he would take Buster back home to the Catlins during the summer break, where he would remain next year.
"Then hopefully we'll have him for Christmas dinner next year."
Being a farm boy, Mr Stott said he had learnt not to get too attached to livestock, and was comfortable with the idea of having Buster on his dinner plate.
But he wasn't convinced his flatmates were as detached.
In the meantime, Buster seems happy to lounge around on a couch, keeping his flatmates company while they study for exams.