In a life-threatening emergency, you can always turn to your vet.
The costs are generally significantly higher if the emergency is outside of normal consultation hours.
If you cannot contact your vet, please first call the Tierärztlicher Notdienst (emergency veterinary service). This link shows all practices with on-call services along with their phone numbers.
If it is outside of emergency hours there too, please contact one of the two following veterinary clinics:
Klinik für Kleintiere, University of Leipzig:
Phone: 0049 341 97 38 711
An den Tierkliniken 23, 04103 Leipzig
http://www.kleintierklinik.uni-leipzig.de
Tierklinik Panitzsch:
Phone: 0049 342 91 20 276
Carl-Benz-Straße 2, 04451 Panitzsch