Do you give him any fresh fruit and veggies? Greys need a well balanced variety of both. They are prone to vitamin A deficiencies, so foods rich in A is a must. Sweet potatoes, for example, are loaded with vitamin A. Absolutely no avocados as it will cause liver failure and death.
I'm actually not familiar with this particular brand of pellets.
Yes, he appears to be doing it in "fits" wherein he will twitch often for fifteen minutes or so and then not do it for several hours. Here is the most recent video taken this morning. Could it be his diet is not good enough? I feed him 3 times a day with his pellets.
IMG_2274.MOV
IMG_2274.MOV
IMG_2274.MOV