My mother-in-laws cat, Mitzi, wasn't well last week - a problem with her kidneys that she's had before. So she got some medicine from the vet etc. but then almost immediately and very unlike her the cat went missing. She's old and a rescue cat who'd been poorly treated so she stays pretty much in the house and the garden. Sadly it's been a week now with no sign of her.
It's the not knowing that's the worst bit isn't it.