http://www.armchairpatriot.com/Home-Vet/Plumb%27s%20Veterinary%20Drug%20Handbook%20%5BDesk%20Ed.%5D%206th%20ed.%20-%20D.%20Plumb%20(Blackwell,%202008)%20WW.pdf
Scroll to page 682
https://www.drugs.com/vet/terra-vet-200.html
Looks like 9mg per pound
It is probably going to be a very small amount..probably under .2 ml (5lb would be a dose of .2ml)
But do not take my word on this...
I have never heard of this product...
Looks like it has to be injected and you would be...