Milk producing animals first appeared in the triassic period?

Milk-producing animals, specifically mammals, did not first appear in the Triassic period; rather, they evolved later. The earliest mammals emerged in the late Triassic, around 200 million years ago, but true milk production and lactation evolved in the early mammals during the Jurassic period. These adaptations allowed them to nourish their young more effectively, contributing to their evolutionary success.