> strange thing is that it took a week after I put the wine in before
> this seeping began.

That looks like your hoops just need snugged on that end. Wash all of
that off so it doesn't turn to vinegar if it's an active leak; although
that isn't a huge risk. Look for gaps between staves, if you see them
it may just need snugged up.

You work from the center out and it's best to do it empty. Set the
barrel on end and get a flat piece of steel and hammer, just tighten
that second hoop if the middle of the barrel has no gaps. Work your
way around. Then see if the top one has any room to move.

It looks like a good barrel so you may just want to contact the vendor
and ask them for the next step.

As a heads up I took mine apart after Tom S told me it was no big deal
and I put it back together with no issues. All I did was mark each
stave with a number to get it back the same way it came apart and match
marked the heads. It wasn't hard at all. I'm only telling you that in
case you are told it's your problem and end up at at that point. It
doesn't look like you need to do that at all. My heads were glued and
warped a bit but I still got it together, I took it apart to toast it.

Joe