No, seriously. There's a cat who takes the bus to the fish and chips shop. What did you think, I was setting up a joke or something?
Can't say I've seen many animals on my public transportation. Had a bird in my garage the other morning, but that was over the weekend so I can't really call it a commuter story ;). And I've seen my share of deer and wild turkey roaming around the streets as I drive in. But actually on the bus or train? Not yet.