Hi - I am in the process of choosing a pool....although I am really wanting fiberglass, it seems that there are so many more possibilities with a vinyl liner. My concern, however, is my 3 dogs (yes, 3....I often as myself why as well). I fully expect - and want - them to swim with us but am concerned about them tearing the liner with their nails. I do try to keep them trimmed but am wondering how durable the vinyl liner over the steps or tanning ledge are? As far as that goes, do I need to be concerned about setting a chair on the tanning ledge? Am i asking for trouble? Can anyone share their experiences/lessons with me? I know I will have to teach them to come in and out of the pool by way of steps but "dogs will be dogs". Thanks.