It's common here too you can get it at any of the supermarkets, Migros, Coop, Manora etc... though perhaps not all the time, failing that probably at any butchers.
You have to go to a larger Coop / Migros to find rabbit meat. Usually it'll be in the fridge section chopped up, it'll be a few cuts packaged together, but in the Seilbahn Rigiblick Migros you can find a whole rabbit in the frozen section. Or else at the Saturday market in Oerlikon, there's a stand which only sells rabbit meat.
Sometimes you will find Chinese rabbit meat which I would avoid. It's travelled a long long way plus Chinese health, additive and animal husbandry rules are even looser than the EU. I know the importers claim to control them to stricter standards but how well can you trust this?
I know I've seen cut pre-packaged rabbit at Coop but I almost want to say it was in the fall.
Meanwhile, I have also seen whole (well, headless) rabbit at the butcher counter at Manor within the last month or so (I don't shop there often).
Also, don't feel odd about asking for rabbit here, it is a common enough thing for folks with the space to raise a few rabbit and / or chickens for their own kitchen.
It should be labelled with the Standard German name Kaninchen (Spanish prononciation janinjeen) but it may in case of doubt be labelled in Swiss German with Chüngel . You might ask the butcher wo händ Si Chüngel ?
And the second line in French would be LAPIN, and the third line in Italian coniglio .
Chüngel are a very traditional meal in Switzerland