I've only been running a daycare for about 1.5 years, so I've really only transitioned one set of one year olds. I recently started a new 15 month old, and he constantly had his thumb in his mouth. He's gotten much better now that I've had him (it's been about 6 week I think), but as soon as mom picks him up, his thumb is in his mouth instantly. I think it's safe to assume he sucks his thumb most of the time when he's at home.
I'm curious if there's a connection to this and his lack of ability to chew and swallow food and drink. He's made a tiny bit of progress on keeping food in his mouth when he's chewing, and he still has an awful time keeping his milk in his mouth when he's drinking. What is everyone's thoughts on this? If there's an actual connection, and not just one I've imagined, I'll talk to the mom about keeping his thumb out of his mouth at home too.
I should add this child is behind on a lot of other skills too, so his eating skills could just be a part of whatever it is holding him back in the other areas too.