Ferret
The Ferret is an orange creature that occasionally visits 快乐大食堂1 (Happy Canteen 1, not to be confused with Happy Canteen, which is a different feeder).
It's unclear what type of Ferret it is, as it's fur is a shade of Orange similar to what a lot of the cats have, while most ferrets are either darker or fully white.
The orange Ferret was first seen on February 23rd, with the most recent visit being on March 7th.
The Ferret usually doesn't stay in the feeder for particularly long compared to the cats, it's last visit lasted about 2 minutes.
Other Ferrets
There have been different ferrets in other feeders as well, one white ferret as well as a black/white one.