"the dogs should have found her if she was in the woods"
You are putting dogs on too high of a pedestal here. Dogs can help but they aren't going to be 100% effective by any stretch. They used dogs in the Devin Bond case and
didn't find him after picking up his trail when he originally went missing. Then just last week, more than two years after he was last seen, he was found not far from his last-known location. They wonder if the dog had the wrong scent originally -- and therein is the problem when it comes to working with animals: they can't talk and we're essentially trying to make inferences about what they are thinking. We aren't going to make those inferences with complete accuracy by any stretch.
An abduction is hard to accept under the case's circumstances in my opinion. Way too risky to take an adolescent that could scream to nearby people, of which there were lots. Clubbing her and dragging her through the forest to a vehicle sounds incredibly difficult given the terrain. Also, Trenny wasn't a five-year old that could be lured quietly with a lollipop.
If she left voluntarily as part of a pre-made plan then there's a question as to why she would do that and why she never turned back up in all these years. Pretty cruel to keep people that loved you out of the loop. Maybe she voluntarily left and then died in another way? You could imagine some scenarios like that for sure but I think those are fanciful. Voluntarily disappearing for a reason no one knows and never-ever showing up again is a big stretcher compared to her just being missing in that forest still -- a forest that's gobbled up a lot of people over the years.
