Severus Snape's Patronus was also a doe, which symbolized his love for Lily. Snape uses his doe Patronus to show Dumbledore that he never fell out of love with Lily, his childhood best friend. According to Rowling, Snape was the only Death Eater who could conjure a Patronus charm at all.
As just for sitting on the counter for a few hours, it will not hurt it. If you recall, these dressings sit on the shelves of the grocery store until you purchase them, so being outside the fridge is not intrinsically harmful. Once they are opened, though, it is probably best to refrigerate them.
The notable pickle taste comes from the pickles on top, while the chicken itself has a salt-sugar brine that, according to the ingredients list, also has MSG, a chemical that makes everything taste good.
Many bloggers and Chick-fil-A regulars believe that the chicken breast in the Chick-fil-A Chicken Sandwich is brined in pickle juice before it's breaded and fried. This key ingredient helps carry moisture and flavor deep into the chicken in the same way it would help flavor a cucumber.