A cow craps everywhere it steps. It both grows and kills plants. Yes, it could be a problem if your water is naturally fertile. However, I've seen some ponds in pine tree country that were mostly infertile except for manure. They grew some beautiful fish.

They also are going to erode the bank and wade in the water. The best bet is to minimize their effect by fencing off the pond and watering them elsewhere.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa