Switching from Pure Goat Company's follow-on milk 2 to follow-on milk 3 a little earlier or later is not a problem. The indicated age on the packaging therefore partly overlaps. However, follow-on milk (and that applies to both 2 and 3) is not suitable for children younger than 6 months. Until then, they are still completely dependent on what they drink, whether that is breast milk or follow-on milk. Follow-on milks 2 and 3 are tailored to the needs of older babies as part of a varied diet.