Welcome to Zoo Admin.
Some things made for Zoo Tycoon 1 were not made properly. In the early days of Zoo Tycoon, many web sites did not test the things that were submitted to them. If you find such animals, you might want to say which ones have that problem. They probably would not be fixed because that particular problem would take a lot of time to fix. But maybe comments would be added on the download pages to say they have that problem so others will know before downloading, allowing them to decide if they still want the download or not. If you find scenery with that problem, there is a chance they might be fixed since there are only a few graphic images for objects.