Poultry Nutri-Drench, Poultry Cell both contain vitamins and minerals in a liquid supplement--give 1-3 ml per day. Roster Booster Poultry Booster is added to the feed in a measured amount. Most of those are available at TSC and other feed stores. Here are some links to read about them:
https://www.valleyvet.com/ct_detail...G1kwsYDaSL10sze7gDD_oOLQ4bKULRRap8aAo8B8P8HAQ
https://www.valleyvet.com/ct_detail...GYj1VawyUIZxf1cROIievT06edlAn4ltf0aAiY38P8HAQ
https://www.valleyvet.com/ct_detail...l3r330xjB4m4uM6IriGLNKtD99gsSB_ZTYaAqLY8P8HAQ
https://www.valleyvet.com/ct_detail...G1kwsYDaSL10sze7gDD_oOLQ4bKULRRap8aAo8B8P8HAQ
https://www.valleyvet.com/ct_detail...GYj1VawyUIZxf1cROIievT06edlAn4ltf0aAiY38P8HAQ
https://www.valleyvet.com/ct_detail...l3r330xjB4m4uM6IriGLNKtD99gsSB_ZTYaAqLY8P8HAQ