Thanks Hannah, that's super helpful.
In testing the site, I came across a problem. In the portfolio navigation, when I use the navigation arrows (back/next) it links to any old portfolio item, regardless of category. This is no good, because visitors might think that dogs who've already been adopted (category "Happy Tails") are actually available ("Available for Adoption"). I could eliminate the display:
.portfolionav {
display: none;
}
But I'd like people to be able to see click through easily to all of the dogs available for adoption. Any way to change that? Thanks!