Where to shop for copper?

[flarytails]

I have decided to bolus my goats. Any suggestions on the best places to purchase the copper? My old goat is the one showing signs, do older goats have a harder time assimilating copper? They all have constant access to loose minerals but is it good to bolus all the goats even though they don't have the fish tail and lightening hair?

[jill.costello]

You can purchase a little tub of Copasure online, just google "copasure" and then click the link for "shopping results". Use the drop-down menu to ask for "price: low to high", and look at the stores offering it for the cheapest.