Hi Phunphysio,
This is not an easy question to answer for two reasons:
-I have never treated a child with Charge syndrome and
-I had never heard of Vicky Mead uptill this point (amazing how many people are out there, doing good for our profession and we just do not know about them)
I have seen similar behaviour in children with PEGS.
I wouldn´t be at all surprised if the PEG does hurt and that this is the main reason for them not wanting to lie on their stomach, or sit.
One infant I treated (with a huge amniocele) and normal cognition, was able to "tell us" that it hurt him. This boy was carried prone, with no pressure on the stomach and that was OK, He developed well even if he couldn´t use all the so-called normal motor milestones.
In that respect I love the work of Karen Adolphs (and Mijna Hadders-Algra)who have been advocating that variablity in movement (& transitions) is normal and possible.
I would suggest you try to make physio as fun as possible (something you normally do I am sure).
Make his goals yours.......
I have seen more children, who refused to do anything prone, crawl around as youngsters after they had started walking.
kind regards
Esther