This is on Forest River and the cow breeds mod is enabled. I did not set the mark on its back. I’ll give it some time and see if it changes back to normal.
Viewing post in FS25 Realistic Livestock - Ritter version comments
make sure you have the latest pack and see if that solves it. Updated today I see. https://github.com/ConGan98/FS25_CowBreedsRLRM/releases/tag/v1.0.4