Unfortunately,if you have an intact male,he will regress with the potty training ALOT.
Milo (my boy) is a year old,and for the first 5 months he was 100% potty trained.He was FANTASTIC and I was sooo proud of him because he was a breeze to train.
But then at around 5+ months old,he started peeing up my couch and walls so we started with the potty training again.It took another couple of weeks to get him to use the pads again,and then he was fine for a while,but since then,every now and again he will have days (or even weeks) where he pees up my fireplace,the couch and certain furniture.We call them his "off" days,because we can literally see them coming.On those days,he´ll shake when he has to pee (because he knows he isnt going to use the pad) and he holds it in until we arent looking so that he can pee where he wants and not where he´s supposed to.
We´ve been told that at this point,neutering him wont necessary help (we´re still getting him done though),because now he´s marked everywhere and he´s got into the habbit of lifting his leg,he will always do it *sigh*
I did make a few belly bands and used them for a day or two,but they made his coat (around his belly and side area) look and smell DISGUSTING due to being in constant contact with pee (even though we changed the pads regularly).So we just deal with his regressions by going back to basics in potty training and hoping it passes quickly,because outside those "off days" he does fine
His most recent regression lasted about 2 weeks and it was driving me crazy..he peed on EVERYTHING
In the end,we brought a big rock in from outside and put it on his potty pad.We soaked some kitchen roll in his pee and rubbed it on the rock..now he pees up that 