Hi Adria,
What are you feeding him? I have a few tricks up my sleeve as i am a mother of a 2 year old girl who i nursed until she was 15 months old, but she is such a big girl that i also had to supplement with solids. I would always steam her veggies, and then puree them with the liquid from the pot that i steamed her food in to give her the maximum nutrients and then sometimes add a little organic chicken broth to it for some flavor. the other thing is that if you have a very "advanced" 9 month old, he will want to eat what you're eating, so make yourself some healthy pureed potatoes and mix in the pureed veggies with some very soft chicken that you can also add chicken broth to for more flavor, and let him eat what you are eating!! Kids love to emulate their parents. Another thing I have always given my daughter is plain oraginic whole mile yogurt with pureed mango or mango and pear mixed (as long as the fruit doesn't have seedy stuff in it like strawberries) and mix the fruit with the yogurt, it's really healthy for you and for him, and something he can eat without teeth!
Hope this helps. The first years of food are the most important. And will build the foundation for what kind of eating habits he has later, so if you have the time, try it out!
Good luck!
S.