Hi there, hope you don't mind me jumping on board!
It sounds a little to me like you're new to closed species (if you aren't oops, my bad!). Closed species are just that.. closed. They aren't open to the public to make more of. Even if you drew them a sister as a human, or anthro, or anything else it would still be you creating another Snoot without the species creators permission. Even if the Snoot is in another form (like anthro) it's still a new Snoot. I also don't think this species is allowed to have human or anthro forms, I could be wrong though with that
If this was an open species you could go crazy and create as many Snoots as you like with no worries! This is a closed species though, so no Snoots can be made without Panda's permission. If you'd like to create a sister for this Snoot you could always buy a ticket from
Panda's store, or just keep your eye out for another Snoot you like you can adopt and make them related ^^ You could also just draw a regular deer to be their friend, as long as you don't call the new deer a Snoot!