When you say worm check, did you run a fecal this morning? Just look at FAMASHA score?
It could be a few things, worms, especially barber poll can cause a very fast onset of scours. Diet change is another. If he has been eating the leaves I really wouldn’t think that is the cause but it’s a good possibility. I would give him some probiotics and dark beer is always my go to with anything stomach related. It could also be a bacteria and even pneumonia. Usually if it’s bacteria they run a temp so I would go get a temp on him and see what we have. If he is acting fine that probably isn’t the case but sure isn’t going to hurt him to check. If you think it’s the leaves try to keep him from eating them today. If his poop firms up then that is most likely what is going on. I personally if he doesn’t start getting more firm by the end of the day would send a fecal in tomorrow, since no one is open today (unless you can run it yourself). Hopefully he starts feeling better for you.
It could be a few things, worms, especially barber poll can cause a very fast onset of scours. Diet change is another. If he has been eating the leaves I really wouldn’t think that is the cause but it’s a good possibility. I would give him some probiotics and dark beer is always my go to with anything stomach related. It could also be a bacteria and even pneumonia. Usually if it’s bacteria they run a temp so I would go get a temp on him and see what we have. If he is acting fine that probably isn’t the case but sure isn’t going to hurt him to check. If you think it’s the leaves try to keep him from eating them today. If his poop firms up then that is most likely what is going on. I personally if he doesn’t start getting more firm by the end of the day would send a fecal in tomorrow, since no one is open today (unless you can run it yourself). Hopefully he starts feeling better for you.