When we put our DD (6.5m) in her Bumbo, after a while she keels over the the left side, quite severely. She also leans to the left a lot in her high chair and she can only roll over to her left hand side. She rolls over by going over her left arm, she doesn't stick it out or anything. I know this sounds a bit like she is just developing a preference for one side but we're a bit worried that she might be a bit lame on one side or something. I feel daft asking because it sounds like nothing but me and DH are a bit worried about it.