I'm the "unknowing". Except I've seen the animals being born, fed them, seen them being transported 2.9km to the Butcher and even plucked the chickens. Either they sell it there or give it back to the farm to process it.
I herded them to the grassland early in the morning and brought them back at the end of the day. Or watched them, since they and the dog knew the drill.
We even have two sheep in our backyard. 20 are - more than enough - of nice lawn, with two sheds.
The meat I eat IS from happy animals. I know because I knew the animals.