My dojo keep laying still even tho if i pick him up and stuff

is he playing dead? he did this morning when i went to work and when i got home he was like all over the tank. Now he laying still again. on his side =( anyone know what wrong or is he playing dead? the other dojo is doing great and he kinda like iono... Now he just move and on his righfully position... And now he going crazy again all over the tank!!!! OMG what he doing any one have any idea? or any clue? I love him he a great dojo and now he sucking on my red cap gf. I m lost... AHHHH now he on his side on the side of the tank again his same position adn same place... is he hungry or sick? or hurt? or anything need some advice from anyone taht gratful to give one thank you.