www.qatarvet.com
www.dohavets.com
www.canvetdoha.com

are 3 vets in Doha - check the website for locations and timings and telephone numbers

BTW - is the dog a stray? Unfortunately, in the animal kingdom, if you're hungry, it's not considered "nasty" to kill and eat another animal. It's one of the reasons my 3 kitties are indoor kitties only, but I know that's not always a good option for all kitty carers.

Good luck.