I have some Combi-Pen-48 penicillin how much and how long to give it to him, he's about 70lbs.
Is there a ratio formula on on the bottle? If so, take the amount for cattle and and divide by 10. If it says for a 1000lb cow, 5ml. A 100lb dog needs .5ml.
The dura pen i hav says 2ml per 150lb body wt.