Dog with huge stomach for 1 year+

My girlfriend's family in Thailand have this dog and its stomach is huge. It's been like this for over 1 year. What could be the problem?

Hello!  The length of time you've noticed this for may rule out GDV and pregnancy, except in some rare situations where more than one thing is going on (animals with an emglarged stomach for other reasons can still get a GDV for example).  However, abdominal fluid can accumulate gradually and look like this, so it is more likely that heart disease, tumours, cysts, enlarged livers, womb problems or a combination of these things could be to blame.  Fluid can accumulate due to fluid imbalances eg in heart disease, too.  The main take home message is that something appears to be very abnormal here and that investigations would pinpoint a diagnosis and may or may not result in opportunities to put things right.  Wishing you and your little one all the best.

(I think that one way to start might be bloods and an ultrasound; alocal vet may know more than I do about the types of worm / parasite are are typical locally).

Many thanks, I will relay this on.