When do you start feeding a barn swallow?

Barn swallow chicks typically begin to be fed by their parents shortly after hatching, which usually occurs around 14 to 19 days after the eggs are laid. The parents bring insects and other food sources to the nest to feed the chicks as they grow. If you're referring to hand-rearing, it's essential to mimic their natural diet and feeding schedule, starting immediately after hatching. Always consult a wildlife rehabilitator for specific guidance.