How should I cure my baby rabbit's wound?

[ I am asking this question in particular to gain knowledge on any medicinal herbal application in cases as the following; not pharmaceutical.. of course if possible and suggestible. ]
My small rabbit or nearly over a month has been bitten by another, older male in the pen, in a moment in which they shouldn’t have been together. The gash was pretty large. we only noticed it later that day and treated it therefore pretty much in time.
No worries. He’s still well, eating hopping, drinking, exploring..
But his wound now smells like dead rotting flesh, even though it’s drying an almost fully recovered by fur after 2 days of healing.
Now we’re making horse-tail tea to dab on his little back, hoping it’ll do the job.
Please omit already obvious solutions such as a run to the vet, because there is no vet around us.
cheers, ... and no offence intended.