No help on the neutering topic since Cutty was a year or so when we neutered him. But Mugsy, our pug was neutered right at 6 months, (they were done together) and I did not see anything or any effects that made me regret not doing it then. He is a large pug from what I can tell and very fit etc. I have heard this is a controversy but have also heard that it is all genetics and you will get what you will get. I dunno and maybe waiting till 8 or 9 months is fine for the average person but to me if you are seeing problems I wouldnt wait. I would also say do the things everyone has said in addition to the neutering. Better to be safe and get this problem fixed than be sorry later.