It's not a new thing. She's been farty since we got her a couple of weeks ago. She eats Lily's kitchen wet food. I've tried a couple of others but this is her favourite (and it's what she was eating before she came to us). We sqitch the dry food between Lily's kitchen (which she seems to prefer) and Royal Canin (which she seems to like less, but she was eating before she came to us). She generally poos ok. One time tried a Wainwrights tuna which gave her an upset tummy so went back to Lily's kitchen.