WOW...THANK YOU. It is comforting knowing someone else has "been there". I am sooo glad your Gus is so much better now and I hope that Thor too can also join him in "all better world"

I DO know that he was impacted at 6 weeks pretty badly and that when he started getting bigger stool, that was when the yelping started so inflammation may be our cause also, just in a different spot.
I will definitely bring this up to the vet when I talk to him again.
I DID GET A CALL FROM THE "ASSISTANT SPECIALIST" TODAY! He said that they think he has scar tissue in there somewhere, making it hard for him to pass poo through. He said to think of a straw half plugged with a peanut or something. They said that IF THE YELPING returns they want him to have a test done where they will fast him for half a day and then pump air into him and xray his stomach and colon. If they see something then they can simply do this at the same time that he is neutered. They don't see why we need to do it now because the yelping has stopped but if it returns the test will be needed.
He also said that the problem may be better because the Nutri-Cal has some oils in it that may be lubricating everything and the Nutri-Cal has a natural stool softener effect. So yea, Thor may have had TWO issues. Both solved by Nutri-Cal.
Steph, what food do you have Gus on? We want to do right by Thor so with you having the same issues with Gus I am sure the food you serve is the best for this situation.
We came home from taking my kids to their dad's house and came home to like 6 piles of formed, but soft stool...ALL ON THE PAPER! Yay Thor.