I wish that we could stop using the term "stasis" cos it's about as meaningful as "tummy ache" in people. I know it means long medical words, but we know exactly what we are talking about when we use them.
I would describe Thumper's probs:-
a)"dysbiosis" - wrong bacteria in caecum - causing slow down of the colon. ( Cause- Diet - couldn't get him to eat hay, & resorted to wildie food of apple tree bark/ hawthorn leaves/blackthorn leaves to get in fiber in addition to grass & stopped all starch/fruit/sugars.) He's now had his grass stopped.
b) mechanical block of the large bowel - colon [obstruction] by poops strung together with fur & getting tangled up in a ball. [these pass normally if the gut is working properly. he's managed a 9 bead necklace no probs!]
The symptoms of the 2 probs are quite different.
The underlying cause of both is molar spikes which make it painful to eat or drink although he's no sores,& also prevent the side to side grinding motion of chewing.
There are other things which will tip the balance for him e.g. heat/dehydration/pain/ fear (cat or fox scratching round the door) & GP vets but not GWR vet! (possibly smells) are a few.
What do you feel a special posting for the diagnosis & cause of these gut probs & trying to persuade a vet school to do further research? It's just so awful for our buns & us to struggle with it. I feel we may be missing something, cos lots of buns seem to have gut probs at the same time. "Cottontails Rescue" at Westbury Wilts had an "epidemic " of "stasis" which started with a new arrival - suspicious of an infection problem.
You described two reasons for a bout of "stasis", but PAIN, and the inability to move contents from one end of the pipework, to its exit, for whatever reason, still remains the underlying constant.
My argument, is purely that immediate, adequate, pain relief and non oral fluid therapy should be given to any rabbit who's gut has slowed, or ceased, until the cause can be determined, and appropriate treatment given.