Help!

So, yeah, it's been a while since I've posted. Oops. I always seem to think of ideas to post and then talk myself out of them.And now my first post in over a month is about digestive issues and all things potty training. Fun!

I started potty training the twins in the beginning of October. N is completely trained, and has been for some time now. She rarely has accidents, and when she does, she gets very depressed and embarrassed.

And in the other corner, we have A2. I've known since he was a newborn that he had digestive issues, specifically redundancies in his colon. As you might imagine, this can make potty training interesting. So, I began adding more fiber to his diet through fruits, veggies, and a fiber supplement for kids to keep things moving. And now, instead of constipation issues, he goes four or five times a day. This would be great if he cared AT ALL about doing it in the toilet. Seriously, my other boys were somewhat apathetic about potty training at the beginning, and even for a while would have an accident and just not care, but I've never seen apathy like this. He really could. not. care. less if he poops in his pull-up, underwear, diaper, you name it. And if he's going to poop in it, why not just pee, too?!

I feel like I've tried so many different tactics and nothing's worked—different treats and prizes, taking away the toy he was playing with if he had an accident, going over and over again what he should do if he thinks he might need to go to the bathroom. Nothing has worked. And I mean nothing. Friends keep telling me that I should try pretending to not care and that he might finally come around, once he thinks it's not a big deal. (You know, the whole, "Stop caring so much cause kids thrive on the reactions they get.") I really am trying, but I have difficulty not caring about cleaning up poop all the time. Right now, I'm just going to really concentrate on not yelling every time it happens.

So, I need help, cause this is really beginning to weigh me down. I know every kid is different and eventually, he'll come around, but I just can't seem to discover how to get there. And my patience for poop ran out a while ago.