[Skyblock] What ever happend to horse spawn eggs?

So, today I thought I'd go ahead and buy a horse spawn egg from the shop at spawn since I remember them being sold at the old spawn. Then I noticed, the horse spawn eggs are no longer being sold. Does anybody know what could've caused this?

 

I don't remember there ever being horse spawn eggs but I may be wrong. Some items are removed from the shop because they are maybe to op or some other reasons that the owners think of. Sometimes they will be added again and sometimes they won't come back. The staff might know about it but I'd ask around.