State by state and city by city, find your nearest dog and cat hospital or animal emergency clinic. For example:

Q: I'm looking for the cat hospital in Oshkosh, WI
A: Simple! Just surf to: Small Animal Clinics > Wisconsin > Oshkosh  

Q: How can I find the cat doctor closest to me in Lexington, KY]?
A: The "Kitty Dr." can be found here: Small Animal Clinics > Kentucky > Lexington

Westbury

Wilder Arthur N DVM, 319 Union Ave, Westbury, NY 11590; call: 516-333-1123; located in or near Nassau county

Westhampton Beach

Homeopet LLC, 14 Glovers Ln, Westhampton Beach, NY 11978; call: 631-288-6883; located in or near Suffolk county

White Plains

Animal Welfare League Spay Neuter Program, 148 Martine Ave, White Plains, NY 10601; call: 914-948-2094; located in or near Westchester county