Oh, you are not going to like my answer! I had some issues with Snuffles a few years back. My rabbits were at the back of my 7+ acre property and I washed and changed after tending them in the evening. Then I drove 30 km to work every morning. I am a teacher. The classroom bunny got Snuffles as well. Yes, it could have come from anywhere, but I suspect I brought it to him from home.