Hi Susieqz,
Next time use the ole way : Bucket full of water ( or river if you have one passing by ), and everything in the water trap and rats , after 2 minutes they are done ...
@greenfig: buy a small pot of koïfish sticks. and bait with that... You'll have a lot more of success !
When a rat gets used to your baits, just use another type of baits . Use gloves or hands washed in dirt when manipulating the traps.
I just found an hole near my cherry-tree ... The Puttange trap is already waiting ...
IMO, releasing is just like throwing a boomerang ... Watch-out sometimes they strike back at you ... So probably, not the best solution.