Hey Folks, I decided to play through the game again after a year of not playing the game. At the moment im downloading the expansions. I Started a new game and voila..... got the horse glich.... thats pretty anoying ... tried one of my older savegames and here we go.... it's working fine....
Started again -> new game -> horse glich...-.-'
I couldn't find any solution for this via google...
Hope you guys can help me!

When i played it the first time I never, ever had any problems/gliches at all.

My System:
Intel(R) Core(TM) i5-4690K CPU 3.50GHz
16 GB Ram
Win 7 64 bit
GeForce Nvidea GTX 970

What exactly do you mean by "horse glitch"? Is Roach (or Plötze if you're playing in German) missing her mane and/or tail?

The horse is invisible in somehow.... or durchsichtig in german...
the Problem is, if i load an old gameplay this is working properly....as you can see in the old gameplay picture i uploaded....

I know Blood and Wine changes horses (or at least Roach), so maybe your missing that expansion has something to do with it.

Another, more likely reason is that something's got damaged in your installation: try the Verify/Repair option.

Edit: If you're using any mods, uninstalling them is the first thing you should try.

This is a corrupt installation. Either you have mods, or you have inconsistent/clashing versions of the main game and DLCs. Uninstall all mods, uninstall the game (keep the saves), re-download the 1.31 installers for the main game AND all DLC, including free. Reinstall the game. If you're using Galaxy, verify after installation.