After 2 weeks of training, Stitch who usually is very fast learner, finally started to catch onto the wings trick training! After a lot of setbacks and problems with him wanting to step up (no matter how I positioned my fingers)or looking for treats, something hit home today and he lifted his wings on his own, just as I was closing with them to touch him. We repeated this for about 5 minutes but after that he got bored with it.
I think the biggest issue with this trick is while I am allowed to touch his wings, he isnt fond of it, and thus he had an instant dislike to the trick. It seems (knock on wood) that we've transcended that barrier now though and will be able to move forward =).
Will keep you updated on our progress !