Great advice, folks. I chopped at four feet thinking that the tree may need, um, something that four feet gives it. I guess I was thinking it needs more buds, leaves for root growth. What's interesting is that there are some leaves that seem fine (not the majority) and then the rest are droopy.
How often should I water the trees? Should I base it on dry (or mostly dry) soil, or assume that they need some water on a daily basis.
I did read a bit on collecting trees, but I didn't come across a lot on "trouble shooting." So, everybody's input is very helpful.