
We've done suprelorin, the results were that he was marginally nicer to the other dogs (he 'pushes' them, standing over them and seemingly going 'ha, look at my fully functioning balls!' and also tries to control where they go, they being my two older males, he wouldnt DARE do this with the girls!)... but quite a bit worse with people..
Thing is he is SUCH (for want of a better word and to coin OH's phrase) a nobber with people he doesn't know, rehoming him just isn't an option, particularly if neutering him would make him worse, as theres no way I'm rehoming him entire (his genes just DO NOT need passing around).
In his defence, he has got bad eye sight (well, hes partially blind and getting more so) but we've gone as far as we can with that at the vets and theres nothing to be done for it.
If the two boys he is such a PITA with were younger, I'd consider rehoming or er, more drastic options (his problems are by no means limited to scent marking!! he will lash out at the other dogs and we have had several fairly serious fights here), but these two are 12 years old and showing their age, they won't be around forever and as I say, he DARE not be an arse to the bitches, they just won't stand for it.
I think we might revisit suprelorin again as I have really given up trying to get him nice with people for now and am just avoiding him ever meeting any!
Id loooooooooove to have all hard floors btw.. I just can't afford to change these carpets yet, they were here when I moved in!