You know that heavier bit of stitching when the thread is secured by reversing for a few stitches at the end of a seam? I didn't want that extra bit messing up the rooster. So I sewed each channel and pulled the thread through to the back by threading the front strand on a needle.
Once both threads were together on the back I knotted them.
When the boning is in I'll pull all the loose ends into a nearby channel so they disappear. Look at how neat the front looks now.
Again, extra work, but worth it.