Rat trap this morning

Rodent trapping is a never ending chore in the barn, as they keep coming from the nearby lakes. The barn is now free of "residents", but still get "visitors". Because there is no available food except the one set in the trap, the visitors usually get trapped quickly, and don't have a chance to take residence.
After a few weeks catching rats, mouse have been the problem, mostly because the mouse traps I had were not sensitive enough. I just received "The better mousetrap" from Intruder, and those work great. I have caught many mouse with them. The fact that mouse are now more a problem than before suggests that rat residents have effectively been eradicated.
As far as rats, I lost a trap a few days ago. I thought a rat got partially trapped and escaped with it. I found the trap this morning, the rat had his two front legs caught.

Not a happy sight, I don't like to make animals suffer. This rat must have died of thirst. This was a first rat I caught in a while, while many mouse have been caught in the past few weeks.
A year ago, I started cleaning the barn. Rat fras was a big problem, due to residents. Today, the barn is clean of rat fras, and only have some mouse fras around the rat traps, from which they can eat the food without triggering then. To solve this, I will set a mouse trap next to each rat trap. The traps are cleaned and reloaded about once a month (or after a catch), and checked every day.
The previous owner used poison, and dead rats would be found in the open. I don't see the point with poison. You still have to regularly reload, so why not reload traps, that way there is no handling of dangerous substances and disposal of contaminated bodies, and no impact on their predators.
For me, trapping is the way.