I'm spending the night at my parents' house tonight to watch their dog and I miss my cats. I've only been gone for 5 hours and I'll be back in like 12 hours, but I hate leaving them overnight. I've only done it once before when I had a sleep study over a year ago. I thought about having my parents bring the dog to my apartment, but an 80lb Lab in a 400 square foot apartment with two cats who don't have a lot of experience around dogs, wouldn't be a great mix. I don't remember having this much anxiety about leaving my late cat overnight, but I also lived with people back then, so it made it easier.