Please do keep us updated on Miss Poppy and what the vet has to say for her. (We had a Spotted Saddle Horse mare who always kept a big belly but was solid bill of health- none of her babies had it, and it was odd for her breed.)
I believe I remember something about change in diet possibly...
To be honest my heart honestly sunk reading the first bit of that first line because I was thinking oh my gosh no. I am so extremely happy that you got to him in time and he's okay now though- prayers for this fella's safety by all means. I think over it a little and maybe it's just the fact...
The word "sorrel" usually just refers to coloration but I can't place my finger on a breed- I'd say QH mix but knowing the height and also seeing the horse filled out and healthy would really help place a breed. Fingers crossed for a good vet check @ABS9590 and hopefully it goes smooth and maybe...
Reading over briefly and looking at his photos, this guy definitely needs some weight on him. Not sure if you are able to do the pre-purchase exam but...If you do bring him home, first thing go ahead and get a veterinarian established. Have them evaluate the horse including feet and teeth. Check...