Thistle gets bloated every night now. Her abdomen is visibly "full", and firm (though not hard) to the touch. If I massage her tummy she will fart several times, which makes her feel better and look more normal. But what's going on? Do I need to get her to the vet over this?

She pooped this morning, and then again about 2 hours ago, normal.

Both dogs get Royal Canin small dog, I opened the bag around new year. Guinness is fine.

I just have no idea what's happening to her right now, it's like she's having a health implosion.