jodywy, I've read some articles over a few years past showing systems like you describe for that problem. Best LOOKING one was with PVC pipe, looking to be 6 to 10 inch diameter, cut to length to fit from the support wire or pipe down to low water line, following contour of the creek bank from side to side. It appeared the pipes would sort of flow with the rising water and ride out the floods, then drop back into place to appear to be a barrier to critters wanting to escape.
I've pointed out magazine articles detailing some of those systems to 'higher management' on this ranch, but to date, none has been tried. Just sticking with the old 'fuss and fume' system when water gets high and fences have to be repaired or replaced!
Having recently gotten 1.11" rain, our first of that amount since early June, we wouldn't mind a bit of a gully-washer and REASONABLY high water in our creeks for a short while! As has been typical of our meager rains this year, we are getting several days of misty, cooler, cloudy weather, which surely does magnify the benefit of the rain, for which we are duly thankful. All those prayers for rain are being heard, if not answered quite to the degree we think we need!
mrj