I have to agree with
@sourland. As much as you want to not 'harm' a wild animal, that bobcat has proven itself to be a threat and danger to domestic livestock. I had the same thing happen in our area with a fox last year. I didn't loose any birds, but everyone around me did. When I contacted the local conservation department, they advised me to shoot the animal as it was a threat to livestock.
Your bobcat now has a taste for chicken and it will range until it finds its way back to your chickenyard, or somebody else's. I took this directly off of the web:
A female
bobcat's territory
ranges about 6 square miles while a male may
range 60 miles. Male
bobcats are slightly larger and heavier than females. Most adult males weigh 20 to 22 pounds, while females average 18 to 19 pounds.
Please be on guard. Did your friend release the first bobcat close enough that you have just caught the same animal twice?
If you encounter another one and can trap it, please call the conservation department and have them destroy the animal if you do not want to destroy it.
I'm so sorry you lost birds to this animal, but in releasing it and it doesn't come back to the buffet table, it has just effectively became somebody else's problem.