Since my cat turned 10 she has been passing noisy and smelly gas...I asked my vet and she said this was normal. Does anyone else have a cat that does this? I have had a cat since I was a child but never have had this problem. Mischief is an indoor cat but does go out on our screened in patio with the pool. But she seems to wait till she comes inside to do "gas expelling". Wondering if any of you have any ideas?