Horses not loading and causing a red screen glitch.

G'day.



I've made a custom resource pack for 1.8.9 and for some reason the textures of all horses just don't load, they all appear invisible except for donkeys and mules.



Whenever a horse gets hurt and takes damage my fps drops and my screen goes red, the only way to fix it is by damaging another mob which is really weird.. Is there a way to fix this issue?



[Screenshots below]



https://imgur.com/X48t4cy



https://imgur.com/JGwhPy5



https://imgur.com/a9zNw2m