How long do you wait before it goes bad?

[BigDaddy]

Hi there. My wife and I bought a few bottles of wine from Newport Vineyards in Rhode Island a year ago for our anniversary and they were great when we first had them. We saved some and brought them home and well we never got around to drinking them because she got pregnant (we had a beautiful little girl) so it took about a year for us to open them up. They had gone bad. My question is - is there a certain amount of shelf life time for each type of wine before it goes bad? We did get this wine right from the winery so maybe we should have asked, but I thought unopened wines (Red Wines) would keep for longer than a year. Thanks in advance. BD