Hi Nekomimiranger,
While contributions to this booru are appreciated, the booru's primary goal is to be a repository for pictures made for the Zootopia thread on 4chan and by members of its community. 4chan does not archive images on its own, so the idea is to keep the thread's creations somewhere more permanent. It is not intended to simply a repository for any Zootopia-related images; otherwise, there would be many more images uploaded here. There are many places to find that kind of art -- DeviantArt, Tumblr, Twitter, FurAffinity, Pixiv, etc. -- but often times, art for the thread is not posted anywhere else but the thread, and they could easily become lost if not for the booru.
From my understanding, your posts were not deleted out of malice or contempt, or necessarily because of their content, but simply because those kinds of posts are not what the booru is intended to be a repository for. I'm sorry for that, but I hope the reasoning for it is understood.
Thank you.