Rats?

[Laserbeak]

I live in NYC and I wanted to put some non-orchid plants up on the roof, and got in trouble for it, but they said I could put whatever I wanted to in the "backyard", which is of course covered in concrete and surrounded by 14 - 20 story buildings and gets little direct sunlight.

I put some plants out there, and actually they seem to be growing halfway decent so I thought I'd put some high - medium light orchids out there to see how they'd do. But I was just thinking about rats. There are, or course, rats in New York City. Some of them seem to be as big as cats!

Do rats eat orchids? Actually, like I said, I've had some non-orchid plants down there for a while and I don't see any signs that something was eating them.