Quoting MonkCakes:" thank you so much with the info it really helps! I wish we would have gotten in sooner then 8.5 months ... [snip!] ... to the dr when she was 4 to 6 months but the dr kept saying it was no big deal and all that I really hope its not to late "
How mild is it? I can hardly tell just by looking at photos on your profile but I do see a slight tilt in some pics. River's wasn't extreme IMO, but I would say mild I guess but only because she could turn the other way but immediately turned back. If we tried to force it she would fight us and get fussy. She would always have her head tilted up to her left with her right ear down touching her shoulder. Now you can't even tell.
Here is a pic to give you a general idea..
She was only 5 1/2 weeks here..
And then at 4 months when we decided it was time to get some help:
Sometimes they grow out of it one their own. Others could lead to more physical issues as they get older if not addressed properly.
How is Penelope's posture when she sits? Does she lean or does she sit straight? At first Riv would lean to her left, but as time went on and the more sitting she did her muscles strengthened and she sat more straight. However, one shoulder still sits a tad lower then the other, but it's not noticeable. When she would crawl (army crawl) she would only use one side of her body, mostly her right. Her PT said her muscles were tight and so we focused on having her reach for things using her left side.
She wears a helmet now b/c she developed some flatness (plagiocephaly) on the back of the left side of her head for the way she would lay before she was able to sit on her own.
Here's another photo of her now with her helmet, she still has a slight tilt and that one shoulder is still lower than the other:
Things are getting better for her and I'm very optimistic they will get better for your Penelope. It's not too late