K.P.
Ok I wrote out this long response and then hit the back button on accident...
My daughter is 22 months and will sometimes not swallow the last bite of food for a while. She seems to eat OK now (minus the food in mouth thing) but has had her fair share of feeding issues. Is your daughter doing this with the first bite or is she at least eating some and then doing this? It may be normal and just a way of showing control over something.
First I would ask your dr if you can get a referrel to a speech or occupational therapist to evaluate if she is actually having problems or if it is a normal control issue. Or you can get with the Early Intervention program in your county to have her evaluated for free and if you qualify financially, you can get some help for free too ( I believe).
The website is http://www.ohiohelpmegrow.org/default.aspx - the program in ohio is Help me Grow. They came out to the daycare I guess once a year and evaluate all the kids.
Anyways, I just looked at their website and saw they have lots of advice on feeding....
This one is particularly interesting....
http://www.ohiohelpmegrow.org/parents/nutrition/child/ref...
Number one is do no stress about it or talk about how much she did or didn't eat in front of her. I guess they can take this a few different ways - as you doting over them, or they see it as control issue. I remember it being hard not to worry though! But we have just kept at it. We provide her the food and it's her job to decide whether to eat it or not. We can't force her - again the control issue.
My daughter can also take a long time to eat. One of the books I read said it is not unreasonable to set a limit on the length of the meal - I think he said most meals should be done in 30 minutes. At that point you take away the food, pretty soon she will get the point that she needs to eat when she is hungry. I know this will be hard for you because you are concerned with her weight, but if she is healthy she will eat when hungry.
Also see if you can find some books at your library about this topic.... I did and a lot of it was reassuring and helpful.
Take care and I hope this passes soon for you!
K.