I cooked that little hen for 2-3 hours, slow cooked. On top of the stove slow cooked. I think game hens are just tough and stringy. I do have a pressure cooker, but haven't used it on the home grown birds yet. We are both new to growing chickens for meat. DH was rasied around them, but didn't get the practical education for cooking them. He was just a kid then.
This next batch of cockerels....4....are April 1st hatches. I was going to cull them all last week, but remembered I needed to fatten them up with scratch and low activity levels for 2 to 3 weeks first. We didn't do that with the other PR rooster we cooked. He was better then the game hen, but I forgot about fattening him up first. I guess there is something to that theory.