I've known it for a while, but I'm finally publicly admitting that Mayhem is motor delayed. I figure he's two to three months behind; he's army crawling and will balance when you sit him up, but he doesn't sit himself up, doesn't crawl properly or pull himself up on anything, and hardly presses at all with his legs when you bounce him. He will stand up, but only when you prop him against something, and doesn't move his legs to walk. This is at nearly 11 months old. For perspective, my oldest, Monkey, was crawling and cruising at this point, and Monster was already walking for over a month. Mayhem is doing what your average eight-month-old might do.
Normally I'm pretty laid back about milestones, but it's starting to be upsetting to see Mayhem not doing things that I know he should be able to do by now. Any advice, anyone?