Grind it, cook it, dehydrate it.  Chicken in chunks or even worse, shredded, tends to be like sharp leather shards - tough to rehydrate and will slice through your ziplocks/vacuum bags like razors.  Grind it up like hamburger, or buy it ground from the store.  It will respond to the dehydrating/rehydrating process just like ground beef.

Marlin,
How many people in your group and how many pouches of the foil chicken would you normally carry?

If it's only one meal for four or six people, yes, the pouches can be a little heavy, but it's not that big of a deal if you eat it early in the trip.  Plus, they're awfully handy and easy to use.

Maybe you want chicken for multiple meals.

I'm all done with dehydrated chicken.  My last trip I brought a pack of vaccum packed cooked fajita chciken.  It was to die for!  Will be on my list from here on out.

The older I get, the more weight I'm willing to carry for good food.

8 years old and 40 pounds--now that brings back memories of canoe trips about 10 years ago (my sons would have been 7 and 9 back then).  Yes, teenagers can be a real pain in the butt sometimes.     My 17 year-old football playing son is rarely home anymore....when I do see him in the morning, I get a couple grunts, a few belches and other bodily function noises, then a request for the keys and some money....when he comes home later, he empties the fridge, belches some more, but will actually talk in complete sentences instead of grunting...then he's off till the wee hours around midnight.  All in all a typical teenager, but of good character. 

The good news is, even though my boys eat alot more now, they're stronger than me and can carry the extra food and the heaviest of the packs on the trails...they've also become really good fishermen...all I really have left to do now is teach them how to cook!