They have been returned to the MSPCA, ready for adoption. They have some special needs, being a bit timid and easily upset, but considering the progress they made here we think they will do fine once they settle in to their new homes.
Update 2, long overdue
Everybody got adopted. Periwinkle had a touch of cerebellar hypoplasia, making him a little wobbly. He and Purrsimon got adopted together, which is always heartwarming.