@AstralVerset In addition to the mod suggested here as a likely culprit, there could be other mods that cause this issue. Anything that relates to interactions could have unexpected side effects, and any CC on the relevant animals!
If you need to narrow down the culprits, you can do a 50-50 on your Mods folder. This means organizing the files there into bite-size batches and testing one batch at a time. For each test, delete the file called localthumbcache, then put only that batch in Mods. If your game opens, set that batch aside as "cleared" and delete localthumbcache again. If it doesn't open, take out half the batch and see if you're closer to finding the culprit. Remember to delete localthumbcache each time. You'll find some 50-50 method tutorials online too. Once you isolate the file, you can go find out if there's an updated version.
