Re: Supplementing with whole milk at 10+ months?
I think a lot of the benefits versus drawbacks of cow's milk are highly dependent on the child, and various agencies are trying to get at what is best for the "average" child, which is why recommendations differ so much. I think the AAP is just being conservative, which isn't necessarily a bad thing.
My son has iron deficiency anemia, so I really don't think cow's milk is particularly good for him even now as it tends to irritate the intestinal lining and inhibit iron absorption until 2 years (granted a couple ounces probably won't make much of a difference anyway, but a significant amount every day could potentially be very problematic). Most kids don't have this problem, so it's not a huge concern. So some mamas introduce cow's milk before a year, some introduce it at a year, some wait until 2 years, and some never give it at all. I don't see a clear right or wrong in any of this as long as you know your child and are making an informed decision. I think we all make our own judgement calls, knowing what we know.
I pumped for 18 months at work because I'm apprehensive about cow's milk. However I work part time so pumping isn't such a major drag, and I have unique reasons to delay cow's milk as I mentioned. I might not have pumped so long had that not been the case.
The recommendation I've seen is to start pump weaning at a year, as Jenna mentioned. I imagine that recommendation, like the cow's milk recommendation, is simply an attempt to find an "average" best time to pump wean while safely maintaining a milk supply. My guess is that some women can pump wean earlier, some might have troubles even at a year.
If you take it nice and slow - dropping a session and waiting a reasonable amount of time to assess the results, I don't think there is too much harm in seeing how it goes. You just want time to gauge how your milk supply will respond and how well your baby does with cow's milk. It sounds like that is what you plan to do (and that you've pretty much made up your mind anyway); so if you are comfortable with the potential issues associated with early cow's milk introduction and whether or not they even apply in your situation, then go for it.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).