There were no guarantees that it would work. The neat setup he had back at his regular haunt was on a much smaller scale, and had required very little adjustment to function; the three rocks had already been in place, they'd only needed to be nudged and tipped over. It wasn't quite so trivial to push around a boulder which probably rivalled his own weight... it was a good thing gravity was on his side.
Duck resisted the urge to glance to the side to see how his rival was performing, or whether he was watching and judging Duck's unusual opening action.
You know what a fish is, right? He could
hear it.
That they live in the water, and not underground, right? By the moon he hoped this would work. At least a little. At least don't let him look like a
massive fool.
With about half of the earth dug out and loosened from underneath the rock, he stopped, and placed both forepaws against it. With a deep and held breath, he gave it a testing shove. It rocked back, just an inch, but it was enough - he let it fall back with renewed enthusiasm, pleased that he wouldn't have been foiled this early on. This time, he put his shoulder against it, and with a carefully and increasingly applied pressure he pushed it free, and then watched it roll almost-leisurely down the bank and land in the water with a single splash and dulled thud.
The water was shallow enough at the edges that it was barely one-quarter submerged. Not wanting to let it settle in that spot, still slightly against the bank, he hopped down and shoved it again, rolling it once over the (fortunately not soft-mud) of the river's floor and let it sit in the water.
He stepped back and observed the change. The river's bed was uneven, and while it was deeper in the centre and shallow to the sides, there were numerous trenches and dips and undulations in its floor created from the constant movement of water. His rock blocked off half of one such shallow trench, which now flowed between the two-foot gap between the rock and the bank. Far too wide to be any kind of bottleneck, but as he retreated and let the tiny fish adapt to this sudden change in the topology of the river, he was pleased to see that a good number of the smolt which were swimming through that trench chose to move through that gap.
Now to narrow it. A faint
plop drew his attention, and he glanced up to see the other man tossing a sizeable catch onto shore. His breath hitched, but he fought back the urge to get petulant and panic, because it wouldn't help, and he was making progress. He was perfectly likely to lose - but if he got flustered now, it would be a certainty.
Forcefully averting his gaze, he hopped back up the bank to the next-largest boulder, and began to repeat the process. This one was a little smaller than the first, but better, for it was less round and more like a long spheroid. Like a heavier version of his favourite of the three stones back home - the most
useful one.