Stomach distention

[Susie]

I've noticed over the past week that my 1 and a half year old syrian Ember has a distended stomach, it's like a hard boiled egg how it feels, her stomach is quite hard. I've not a clue what it could be... the past 2 days too she's completely emptied her food bowl within 5 seconds flat which is really unlike her... she's normally a fussy mare and leaves certain parts of her Harry Hamster in her bowl, her bowl normally lasts her around 3 days.
She doesn't have any other symptoms. She doesn't exhibit any discomfort whatsoever. I have her a vet appointment tomorrow, i'm quite scared.. the only stomach distentions i've dealt with have been closed pyo and stomach cancer

[souffle]

I hope she gets on well at the vets.
I too would suspect a pyometra or a cyst or something inside. Is she drinking a lot?
Fluid can also gather in the abdomen with kidney and heart failure.
Fingers crossed the vet finds out what is going here and can help out.

[Susie]

She's not drinking any more than she usually drinks.
I had the vet appointment with her and the vet said to just keep an eye on her and bring her back if she discharges at all or stops eating/drinking.