Do you really think a hair falls out, on cue, every fifteen minutes? I have no reason to doubt this drop rate, but don't you think it likely that this is an "on average" figure? This would indicate to me, that multiple hairs could have been dropped, or, on the other hand, possibly none were dropped during the time she would have been in the MH. It's all an unknown factor. In fact, we have no way of knowing at what rate of Danielle's hair loss compared to the median, or average drop rate of hair.
I got this tidbit from someone who was making a case that its quite possible to shed 100+ hairs per day. She was making the point that its very possible that Danielle left behind hair in the RV if she played there. At first it sounded like alot until I converted it to minutes.
My intial thoughts were than most of those would be shed while sleeping and your head is in contact with a pillow or while bathing. But so as not to argue my point to much I settled on agreeing that the average would be 1 every 15 minutes. Because even if its ten times that amount the probability she lost it when she was playing there is next to impossible.