I'm a beta tester. (I know the version says 1.14.60 but the beta version I'm on is 1.16.0.58).  When I was looking at the new mobs, I happened to notice that when I move the Hoglin, Zoglin, and Strider spawn eggs to another slot, the eggs turn completely red during the animation. It was hard to capture a screenshot so I can't show what it looks like. Hopefully this was helpful.