What you are describing is not an uncommon characteristic of our formulas. When producing an organic product such as Baby's Only Organic® formula, we do not want to use artificial stabilizers or chemical emulsifiers. When used in non-organic products these additives help the powder mix characteristics stay consistent as well as mix more easily with water. We believe that a few extra seconds of mixing or some occasional variances in the powder are better than consuming these unnecessary and often times hidden additives.
Organic ingredients are subject to changes depending on many factors: growing seasons, region of the country where ingredients are sourced and weather conditions while growing. The variation in between different blends of Baby’s Only Organic® is typically due to the use of organic ingredients. All formulas must meet our strict testing requirements, which include both nutrient composition, and powder physical quality. Physical quality tests (e.g. powder color, texture, smell etc) have ranges of acceptability, which in turn means there may be slight lot to lot variations in the powder. We perform these quality assurance tests to ensure that each batch of our products are nutritionally complete and safe.
The following are some ideas that have helped other customers in mixing our formulas. Firstly, be sure to add the powder to water and not water to powder. One suggestion is to mix the formula ahead of time to let the water soak into the formula, then shake gently. The idea is that you should not have to shake quite as strongly, thus end up with less foam and should mix more thoroughly with less clumps at the bottom of the bottle. You can also mix the formula in a separate container using a whisk or spoon to break up any clumps, then transfer to a bottle or cup.