We had problems getting him to sleep a few hours continuously at night, so we tried adding some food (rice 1st food porridge) to the mix from just over 4 months and tea (Rooibos tea). It actually helped and as time went on we added vegetables (one type for at least 3-4 days).
He had no issues with any so the mixing started of various vegetables and a few months later we added chicken and beef. His milk was still the mainstay. With time the food became more complex and we had little issues with his appetite.
The bad part about eating came later when we started introducing more grainy food, not the smooth stuff. Every now and then a gag reflex would happen, and it could get really messy if he had already a good dinner behind him. I felt sorry for him, shame, but tried to teach him by coughing at such times, which he to his amusement replicated, and we slowly got this sorted. By 11 months the issue was sorted, with a rare happening a while back, and he now chews better as well. Still not a great experience for all concerned.