I have been feeding Marley twice a day same as you, about 7 a.m. and 7 p.m. At 8 months, the bag recommended reducing the amount which I did, but still at the same times. What it may be is the porridge you are giving. Maybe he doesn't like it anymore. I agree with the post, feed what you feed him at night, in the morning as well and see what that does. Maybe his taste has changed with age.