I know it's long distance, but

Veterinary Emergency Center
1299 Highland Avenue
Needham, MA 02192

Tel: 617-453-0143
Fax: 617-433-0319

is where we took Miss Hoppy one night at 11pm when she had broken her leg very badly. They were very kind, and competent, too. The toll call might be worth it, just so you will know.