We started to spot that Andrew was uninterested in drinking from his dark blue sippy cup. It could very well be because he either can't see what's in there, or he has come to associate that cup with having water, like his blue Thomas straw cup.
When we shifted to putting his milk into his lighter, yellow cup, he immediately wanted to drink from that. We will have to test that by putting some Pediasure in one later today and seeing how that goes.
Andrew's ABA therapist observed something else today: when he gets upset, she started squeezing on his hands and arms and it allowed him to calm down much quicker. She went on to test that response several times, and it appears to be a means to soothe him. Next step will be to continue testing it, and if it turns out to work, teach him to squeeze his own hands as a self soothing activity. She said this can be tied to some of his own sensitivity issues and finding a means to contain this will be very helpful as he matures. She said that there is a whole market of body socks, compression vests, and other things like that which are designed to help highly sensitive children calm down. We'll have to think about that if this approach isn't enough.
Another behavior to work on is pairing. This is when we ask him to take a sip of Pediasure in order to get a yummy goldfish cracker. We'll experiment with that as well, although the cup issue might be solved in a different way.
All in all, this is the type of exploration that we are undergoing as his various therapists get to know him better and can fine tune things for him.