Re: sudden fussiness at food
Until a year (or thereabouts), solids are for experimenting with new tastes, textures, and motor skills ONLY. They are not necessary for nutrition; until a year, breastmilk (or formula) provide all the nutrition a baby needs. After a year, the transition from needing only milk to a majority solid food diet may be quite slow, since it's not like babies go to sleep on day 364 needing only breastmilk and wake up on day 365 needing 3 square meals of solids. Many babies do not eat much solid food until well into their second year. So you can really relax about your baby's intake- at this point, solids are still just for fun. So if he eats some, great. And if he tastes some and then spits it out, still great. And if he refuses to eat and prefers to manipulate the solids with his hands- still great, because he had a fun learning experience.
Solids strikes are very common. Self-feeding may help your baby transition away from a strike. After all, purees are pretty boring. Not only are the fairly bland taste-wise and uninteresting texture-wise, but they also relegate the baby to being mostly a passive recipient. Open, close, swallow, repeat. If you let him self-feed, he gets to eat and also to play- he can smush the solids, he can pick them up, he can throw them , he can drop them, he can feed them to the dog... He can even eat them! It's a lot more fun that way.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"