This piece was done by my good friend FairyYuri (https://www.furaffinity.net/user/fairyyuri) almost a year ago. For some reason, I added it to my favorites on FurAffinity, but I'd forgotten to post (or even download) a copy!
The handsome panther with the purple stripes and t-shirt is Mantrid, my primary. The other two characters apparently belong to Donyakavetta (https://www.furaffinity.net/user/donyakavetta)