As much as I'd like to see this, it seems like a lot of work for our artists.
They would have to make an image of each creatu in each stage and if they were to do mummified or something like that, they would probably have to add to the lineart as well.
With the amount of work that would need to be done, I don't really think this is worth the time for a few day event. There are plenty of things for staff to work on already, so I don't really imagine this happening anytime soon, especially considering not all the pets even have the basic dye kit colors yet.
No support unless more limits are put on which pets can be done.