The better fed your alpacas, the happier they’ll be. They’re 100% herbivore, only eat plants and love grass, which forms the bulk of their naturally-occurring diet. They also also enjoy roughage-rich leaves, wood, bark and stems, which they digest with ease thanks to their three-chambered stomach, very like cattle and sheep.
Because alpacas evolved in harsh conditions they use food energy extremely efficiently, much more so than their lowland-living relatives. The problem is, British grasses and vegetation don’t contain the right type of nutrients to keep the animals in good condition, which is where proprietary concentrates come in, specially formulated for their welfare.