Recommended Harrison’s Bird Foods for parrotlets:

Adults:
HIGH POTENCY SUPER FINE for 3-6 months then ADULT LIFETIME SUPERFINE.

During molts, laying eggs, feeding chicks or recovering from an illness: 
HIGH POTENCY SUPER FINE during and for several months following these episodes.

Chicks: 
NEONATE FORMULA for the first three weeks of life; this can be used up to weaning or switch to JUVENILE FORMULA for faster weight gain and fewer feedings.

Parrotlets are the smallest parrot species commonly bred in captivity. The genus Forpus, particularly the celestial or Pacific parrotlet, is growing in availability and popularity in aviculture due to its size. It has a stocky build and a short tail. In the wild, most parrotlet species travel in flocks of about five to forty but the number could be as large as one hundred. They form lifelong, tight pair bonds with their chosen mates. If left alone for too long, a single parrotlet can lose some of its companion ability.

The Pacific parrotlet, in particular, has little trouble challenging other animals and humans. Parrotlets in general are feisty, affectionate and willful. If someone wants a great companion, they should keep only a single bird, because a pair of parrotlets will probably bond closely to each other to the exclusion of the owner. Parrotlets are dimorphic and easy to pair up, and they do enjoy each other’s company. They can also be kept peaceably in groups in large aviaries, but it’s best to keep them separate from other species.