This isn't one-time, happens over time again and again by the same entity.
crash.txt

Walked to these coordinates and copied the world. Killing muddy rabbits or disabling the mod obviously removes the problem. Also observed to see the reason of crash- exactly as in crash report: they eat carrots on the farmland and breed.
This is WIP modpack that is not currently on curse. Here's the list of mods. Let me know if you need exact setup and copy of the world as that could be easily arranged.
Also this is unrelated to "Fix animals breeding hearts" by RandomPatches.

If you remove the mod, do the error disappear?
Are you using a modpack? If yes which one?