Great thread idea Dekka
I've always liked this one
Happy Sierra
(both oldies but goodies)
Lazy Sierra (on the biggest dog bed she could possibly find at my in-laws house)
I have so many of her, and I'm sure there are better ones, but these are the first that jumped out at me.
By far the ones you took of Sierra and I at the fun day a few years ago always jump out as my favourite pictures of Sierra EVER.