I can't thank you all enough for the great advice! I'm still looking for a petsitter, but in the meantime, I decided to take the advice here about enriching Sadie's environment. The Kong has been a big hit and it keeps Sadie occupied for a long time! I also got her a wooden puzzle box that allows me to hide toys and treats inside for her to fish out. I mostly just use the treats to bait her into working the puzzle. She goes wild when I pull it out. Both of these toys do a good job of keeping Sadie occupied while I'm not here. She'll work on it a little bit, then go outside. Then she'll work on it a little more before lying down to take a nap. To make sure they'll hold her interest for a long time, I'm only letting her have these puzzles when I'll be working late. Petziconnect sounds like a cool piece of technology, but I'm afraid that it would scare Sadie, so I'm going to pass.