Hi,
I came across at the start of this year with 2 mutts.

We needed a pet passport which included having the dogs chipped, vaccinated and a rabies injection. Had to wait 6 months after they had had the rabies to be allowed to bring them over (have blood tests to show that its worked). We drove over and didnt end up getting stopped or asked any questions about them (since had a weekend in Germany where we took them and their passports but again nobody questionned their presence).

Also if you want to put them in kennels here while your on holiday etc mine required the pet passport and for the dogs to have kennel cough vaccination.
When you get to your canton you need to register your dogs and pay 105chf for each dog as a tax (think it pays for all the free poo bags and emptying of the bins here).

Hope that helps

Wendy