iVet Animal Hospital in Bangkok is open 24hrs, in Praram 9, near the Praram 9 hospital (but they have branches in Sam Phran Nakhon Pathom Thailand and also some in Vietnam)
https://www.ivethospital.com/en/
Phone: 02-641-5525
if going after 10pm they charge extra 30%
I love to see vet clinics/animal hospitals that are open 24/7. Does anyone have any experience at iVet?