Not sure our commercial food is nutricious enough as everyone seems under weight have read feeding and watering going to try everything people says but is there something else I can give that is really packed full of goodness
Processed chicken feed is nutritionally complete. How old are your birds? What type and brand of feed are you using? Adding other foods can lead to nutrient imbalances, but you can offer small amounts of snacks, depending on the age of your birds.
Have your birds been checked for worms/ mites etc?. How old are they? If all of them are underweight either they aren't eating enough,or the food isn't a proper type/brand or they have parasites. Are your birds molting? Are they laying eggs. Please have their health accessed before adding anything to their feed.