I don't think that is correct.The recommended dosage of Duramycin 72-200 for hens is 10mg per pound of body weight, given orally or mixed with feed, for a duration of 7 to 14 days. To calculate the dosage for your 4lb 11oz hen, you can use the following formula:
- Convert 4lb 11oz to ounces: 4 x 16 + 11 = 75 oz
- Multiply 75 oz by 10mg to determine the total amount of medication needed: 75 x 10 = 750mg
So for your 4lb 11oz hen, you will need to administer 750mg of Duramycin 72-200, either orally or mixed with the feed, for a duration of 7 to 14 days. It is important to follow the instructions of your veterinarian or the manufacturer of the medication when administering any medications to your chickens.