I know you have already posted your reply, however Im baffled as to why no one has mentioned this yet.....It's not colic after 4 months. Colic only lasts the first four months. After that there is 99% of the time a diagnosis, as long as the parents take the child to the ped. If they continue to have crying fits, there's something wrong.....Teething, upset stomach, acid reflux (the most common reasons)etc...
I was ALWAYS told NEVER put anything but formula in a bottle. My kids ped said this, mother, grandmother, all the dr's in the family,(and there are a lot of them), and my own docs said this too. Most books I've read on nutrition etc say the same thing. NEVER feed a baby rice from a bottle. If they don't take it from a spoon they're not ready for solids yet. Not being ready means their digestive systems can't handle it and if you force the issue you can cause problems in undeveloped areas of their bodies. My cousin has stomach problems which when diagnosed they determined that this was the original cause, and he's still paying for it at 25. Also other liquids have extra sugars (even rice cereal) which you don't want sitting on the gums. It also helps with weaning. Once the breast milk or formula is gone, so are the bottles. Adding juice, cereal, or water to a bottle only makes it more confusing.
Careful with Chiropractors and babies..I've heard a lot of horror (truely horror) stories recently. Most babies have mild allergies to straight milk, most of us grow out of it, as a matter of fact most of us grow out of a lot of different allergies, so careful putting too much strain on putting a child through allergy tests. The tests are really painful and can be a huge pain physically and financially for little to no reason. I was supposedly allergic to milk, grass, peanuts, dogs, cats, mold, etc...I grew out of all of them, and really quickly because I did not cut down my exposure. Not the technique for everyone, but I also rarely get sick now as an adult.