Where can I bring my injured animal for emergency treatment on a weekend or holiday?

There are two 24 hour emergency Veterinary Hospitals in Waltham. MSPCA Angell West is located at 293 Second Av. Phone # 781-902-8400.  Blue Pearl is located at 180 Bear Hill Rd., Waltham, Tel# 781-684-8387. Both handle pet emergency care seven days a week, 24 hours a day.  They accept walk-ins and phone appointments.