I was just at the vet for one of my chickens. She prescribed some antibiotics for my chickens illness. She told me that the dosage for a chicken is higher than that for an dog cause chicken's metabolize the antibiotics differently. I'm not good at math like the rest of you all, but she gave me pills that you would normally give a 10 lbs dog... I'm cutting them in half and giving them to my Serama, who doesn't even weight 1lbs... So, yes the dosage might be close to that off swine... Cause the chicken need it!http://www.xtremegamebirds.com/Dosage Chart.html
The dosages are correct, some of the other info needs updating. It's still a good reference though.
I hope that explains why...lol...