Too much is lost in translation...
- Leather/bull/tree trunk?
- Make "it" "disappear"?
- You can push logs onto big cows, and it may be possible to push whole tree trunks onto big bulls (I've never used bulls. They're lousy milk producers).
- I've never tried to take a log from a cow on the overworld map as I've seen no use for that. However, it may be that you get a message that it's too heavy and ask if you want to pull it off instead. If that's the case you can probably not push it on again. I've pushed my log onto my cow, zoomed out to the overworld map, walked to my homestead, zoomed in, walked to the building site, pulled the log off, zoomed out to the overworld map, gone to the logging area, entered and prepared the next log, pushed it onto the cow...