Minecraft: switch off animal growth completely?

Az
- in Worlds
2

(I have asked this question before, but it was a long time ago)

I built a single player Minecraft world with lots of horses and foals. The only problem is that after a while the foals become adult horses. As already mentioned above, I asked this question before and I got the answer that I should install a kind of plugin, but the answer was not where I could get such a plugin or something… You know?

Wo

Should go without a plugin. Only then will nothing grow, wheat etc.

/ gamerule randomTickSpeed 0

Az

I also tried the command. Unfortunately, it didn't work…