9 mo in last week has started to rest her head on her arm while in the high chair, like holding it up is too hard for her, anyone btdt? she has slight low-muscle tone issue, but otherwise ok.

it can range from mild to severe. DD has mild and only in upper torsoe/neck. I noticed she did not hold her arms firm when I pick her up (only able to tell difference because she is #2 and #1 was not like that). and before 4 mos or so she wouldn't re really hold her head up well. Ped says some people just have lower tone in muscles, and in some cases it requires PT. he said low tone people make good ballerinas etc, they will never be "bulky" or solid in terms of muscles.