Drs. Doherty, Rierson, Correll, and Lembke alternate taking calls 365 days a year. Our on-call hours are from clinic closing time until 10 p.m., Monday thru Saturday and from 7:30 a.m. to 10 p.m. on Sundays. Just call the clinic number, 830-625-7551, and the operator will page the on-call Doctor. After 10 p.m. and before 7:30 a.m., the answering service will refer you to BluePearl Pet Hospital in Stone Oak.