Who's Eating My Strawberries?

So I thought it was slugs, or maybe slaters... I put yeast traps in, didn't seem to catch anything, and the nearly-ripe strawberries were still disappearing by the next time I came to check them.
But what did I see today?
The dog, in the vegie garden, in the strawberries, MUNCHING ON SOMETHING!!!! Do dogs usually eat strawberries? The evidence is weighing up against her! She often breaks into the vegie garden, I thought she was just digging in the lovely organic mushroom-compost-enriched dirt... but thinking about it, there's not much evidence of her digging in there, but the strawberries are disappearing...
Now how to keep her OUT?!