That is exactly what happened with Toby! He was acting normal other than he seemed uncomfortable and he had loose poos constantly. Like every hour.
I was so worried and I came on here for advice. Maybe look up that thread?
I fasted him for 18 hours to give his tummy a break and started him on the probiotics recommended in that thread. The next day, he was nearly 100% better. His stools firmed up. Then I fed him half his normal meal with some canned pumpkin. After that, I waited. The next afternoon, after two meals with pumpkin, we had solid poo!! Then I phased out the pumpkin. I really think the fasting helped his tummy settle and the probiotics helped balance out the bacteria in his digestive tract. Also, pedialyte or whatever children's electrolyte replacement drink you can find will help him stay hydrated, just make sure it isn't flavored.
I hope Mylo feels better! Hugs from Toby and I.
Edited to add the link:
My baby is sick and I'm worried
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