When I have stolen the Warhorse Jenda from Merhojoed for a miller Woyzeck (as a quest), is any chance to get this horse back and buy it for yourself?
is any chance to get this horse back and buy it for yourself?
No.
Ok same problem here 
So Jenda is realy lost for this save…?! This just killed my motivation to play … Really no way to get Jenda back…?! So many horses on the spot and I pickt the only one really important. Did this quest befor getting serious with horses and really early in game…
I had opportunity to get him. Kept with Al. Als a decent horse and probably comes closest to Jenda.
And he don’t stink.
are you on PC?
If so You could get the “Pebbles is the best” mod. there are a few versions, One has Pebbles and Roach from witcher 3. beefed up to T5 level
Buy him at level 2 then get the mod. and Bam! T5