People in poor, undeveloped, third world countries will track down problem wild animals and take care of them. Do that here, and you are likely to be heavily fined and in prison. I have a novel idea, let the animal owners here have the right to track down and take care of problem wild animals like animal owners can do in other countries; and the animal owners here won't need to contact the government. That will take care of what you refer to as 'welfare'.
You mentioned Wisconsin. I suggest you travel to northern Wisconsin and ask about livestock owners who were fined or threatened with fines for shooting black bears that were chasing their livestock.
Do actual/factual research on your wolf and Yellowstone claims. Why not start by watching the Crying Wolf Movie? What crops did they raise near Yellowstone in the 80's and 90's for ranchers to file claims of crop loss? Funny, I don't see much if any farmland with corn or soybeans near Yellowstone like you will see in parts of Wisconsin. You may see more now due to the increased corn and soybean prices due to the ethanol and bio diesel demand, but when the Canadian Wolf (which was never native to America) was introduced (not reintroduced) raising corn and soybeans in that area is not likely to be worth the risk of crop loss or poor yields. The climate near Yellowstone is cooler, less humid with less rainfall and a much shorter growing season than southern Wisconsin. Elk do not prefer small grains.
Sounds like you have never earned your living on a farm nor were raised on a farm. FYI - look to see how some of the large corporate farms are recipients of grants or other government monies, and the regulations are written so the large corporate farms are the benefactors or so they at least receive a disproportionate share. IMO, politicians like to keep food prices down and funnel monies to the large corporate farms to keep them in business with the ability to expand their business a little more each year. If this country ever gets to the point where the large corporate farms own a majority of the farmland - hold on to your wallet. Sadly, we are getting there a little more each year. We currently have companies who own seed companies, huge portions of land, grain elevators, shipping ports, livestock, feed lots and meat processing plants. Wait another 20 or 30 years and see what you are paying for food. However, we won't want to hear buck460XVR complain about the cost of food.
You talk about 'confirmed' kills by mountain lions and other wild predators. If you personally see it occur but do not have actual video proof, or 100% authenticated tracks it is most likely to be an 'unconfirmed' incident. With pasture land, you are very unlikely to have any 100% authenticated tracks. IMO, the data is skewed and is therefore irrelevant and unreliable.
It is not just those animals that are killed. The weight those animals lose due to be chased and the lower weights due to stress on those animals are also major factors. You could also have livestock that lose their unborn offspring due to being chased. Then you have animals that are injured during the chase or attack and may have to be put down due to the extent of the injuries. If they are not put down, there will be weight loss and additional expenses during recovery. Then there are the legal expenses for defending your legal right to take care of a problem animal that is attacking your livestock.
I personally do not know any livestock owner who puts out a feeder for deer or other game.
Give the animal owners the right to take care of problem animals themselves without the threat of thousands of dollars of possible fines, tens of thousands in possible legal fees and the possibility of being put in prison and having a criminal record. Allow this, and the land and animal owners will not be contacting the government. With the way the regulations are currently, they are forced to go through governmental agencies.