I don't want to sound mean, but... I kind of hate this change. I was so exited a long time ago when I got this fox:
Pet's name: Queen of Hearts
Now, what is there to distinguish that from this:
Pet's name: Woop
I feel like these foxes have to still be special. I understand the copyright issues, but couldn't you have kept these special? The newer foxes seem to be becoming just another type of pet, and these need to be different. I don't think it would have been impossible to make a separate lineart just for these.
Also, I agree with all the complaints about the birthday fox's background. There's just no reason to remove it, and it wouldn't mess with items except backgrounds, and then maybe there could be an option to turn off the background that comes from the pet? (I don't know, just an idea. This might be impossible to program.)
I imagine that in the future, new members will see these in the archives, and assume something like this happened:
Shima.Luan created four foxes. They were cool and everyone loved them so in 2014 the artists made more. In a way, changing them like this gratifies Shima.Luan, which I'm pretty sure is something you don't want to happen.