A good sitter guide covers the essentials a stranger to your home would need: your dog's daily feeding schedule (amount, brand, and timing), walk routine, and any commands they respond to. Include emergency info โ your vet's contact, a 24-hour emergency clinic nearby, and your own contact details plus a backup person.
Note any medications with exact dosing instructions, plus behavioral quirks like reactivity to other dogs, fear of thunderstorms, or resource guarding. Don't forget the small stuff: where the leash and poop bags live, whether your dog is allowed on furniture, and any household rules (like which rooms are off-limits).
A photo of your dog is genuinely useful too, in case a sitter needs to describe them to a vet or, worst case, help search if they slip out. The more specific and written-down the info is, the less likely small details get lost in a rushed hand-off.