Oooh, I found something for you. Here is a treaty, signed by France and other European countries called the "European Convention for the Protection of Pet Animals" I also looked up the French laws against animal killing and cruelty, but I couldn't read them...they where in French, go figure.

http://www.animallaw.info/treaties/itceceets125.htm

Anyway, I'm pretty sure that you could be turned in for what you're doing, and either have to pay a large fine, or jail time.