Welcome to the boards, J-CCCC
Regarding your question about cleaning out a small pond, I'll just relate what one of my buddies did. He already had a tractor and a small scoop that attaches to the 3 pt. hitch, had a good bit of available time and is always short of cash so hiring it done was out of the question. Anyway, during a real dry summer the water level got pretty darn low, so he pumped it out with a Honda trash pump, filling his freezer with fish at the same time. He let the pond dry out and then got in there and dug out the accumulated silt, sand, etc. with the scoop and deposited that material in various low spots in his pastures. I think he also got in there with a pretty heavy disc to break up the bottom a bit. Didn't deepen the pond but essentially restored it to the original depth and, overall, he thought it was very worthwhile undertaking. I guess it all depends on how much time a man is willing to spend doing the work himself and what equipment he has available. By the way, I think those scoops can be bought at TSC for around $200, or maybe borrowed from a friend for free?
On another note, having seen ponds dug both ways, I think a BIG tractor with a scraper is a better rig to use than a dozer for pond work. With the tractor/scraper rig the operator can quite readily deposit the excavated dirt a pretty good distance from the pond site, if you so desire -- and thats much harder for a dozer operator to do. Also, the tractor and fully loaded scraper probably puts more concentrated weight on the ground for compacting the sides, dams, etc. --- dozer weight is too spread out over the tracks.
BAMA -- I sure agree with you about those cats.