Re: Need Advice on 18-month-old refusing solids.
I have yet to see the scientific study which tests the hypothesis that removing breastmilk from the baby's diet will instantaneously result in more appetite for solids. To my mind, removing breastmilk just takes away the one thing that you know for sure your baby will eat!
I think LLLMeg asked a really excellent question- is your child actually resistant to swallowing anything, or will she eat a few highly valued items? If the former, then I think it may be time to delve into the possibility of a sensory issue or a swallowing problem (I think one medical term for that is "swallowing dysphagia"). If the latter, then you're probably looking at more of problem with extreme pickiness.
I'm really not sure about your doc's advice advice about your child's weight. There are healthy kids in all percentiles, from the 1st to the 99th, and the growth curve isn't something a kid fails because she's under the 50th percentile. Statistically speaking, there are just as many healthy kids in the 1st percentile as the 99th, and just as many in the 5th-15th as there are in the 85th-95th. So I don't see why your child "should" weigh 24 lbs.
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!"