I'm certainly not a J tube feeding expert... as I had mine for 8 months, 4 before my esophagectomy, and 4 after. But this was 3 years ago now, and in general, my feedings went well, although I was a bit of a knucklehead (at first) in understanding the purpose of this tool.

I'll assume his J tube has been properly installed... it has been correctly placed into the jejunum. A simple thing, but I've seen this botched a few times. Then I'll also assume that his problems are of the minor variety (nausea, abdominal cramps, diarrhea, etc)... but still, these are unpleasant. But major complications, like a bowel obstruction, or some infection down there, or the tube has dislodged and is no longer functioning correctly... these must be identified and fixed promptly. I'll also assume it's not leaking all over his stomach area, the stoma site is being cleaned daily, and not much leakage is being seen.

But you're doing what is necessary... trying different feeds (allergic reactions are possible), and I'll assume you've played with the feed rates. I did not do well at 100 ml/hr, but was fine at 75 ml/hr. And is position a factor? Does he notice more discomfort if lying down vs sitting up, or standing while feeding? Have you tried diluting his feeds (I often added about 6 oz of water to my feeds)... this have me added hydration and made clogs less likely. Does he have an elevated temp at all?

Gary