[Bumblebear]

I made a gooseberry cordial a few weeks back but within days it went fizzy!  Is it fermenting good (ie wine) or bad (ie contaminated)?  What d'ya reckon? 

[the great composto]

Not sure about the gooseberry but when I made blackcurrant cordial last year the bottles fizzed up and I think I read that it was a bad thing and didnt use it.