Show one full day before you hand over any paperwork
Routines transfer through hands better than through pages. Before your housemate or partner takes any responsibility, run one complete care day together with you leading and them doing: morning hay and water rounds, the spot clean, the evening feed, the check that doors, lids, and pen latches are as they should be. Talk through the why as you go — why the rabbit's greens come after hay is topped up, why the hamster is never woken midday for handling, why the guinea pigs' floor time happens in the room with the door closed and the dog elsewhere. Let them ask the questions that only occur with a scoop in hand. A person who has performed the routine once under supervision will read the written version as a reminder of something real, not as instructions for an imagined task.
The written routine each animal needs from you
After the walkthrough, write one routine sheet per animal in the order the day runs. Cover feeding with the specifics a newcomer cannot guess: exact foods, portions in the scoops and handfuls you use, where supplies live, and which treats are off limits entirely. Cover cleaning in its real rhythm — daily spot jobs, tray changes, full cleans — and where clean bedding and the laundry rotation for fleece are kept. Cover handling honestly per individual: the rabbit who must be supported under the chest and hindquarters and hates being picked up anyway, the guinea pig who settles on a lap in a fleece pouch, the gerbil who is watched and spot-cleaned around rather than caught for cuddles. Finish each sheet with the vet's name and number, your own contact routine, and the short list of signs that mean act now: not eating, no droppings, laboured breathing, a pet found loose or injured.
Agreeing who does what while you live together
A handover that ends with both people assuming the other fed the animals is worse than no handover. Talk plainly about the standing split: who owns weekday mornings, who covers weekends, who orders hay before it runs out, and how you will signal completion — a tick on the cage rota, a message, a note on the shared record. Agree also on authority: your housemate should feel able to phone the vet in an emergency without waiting for your permission, and equally able to say when the workload of a multi-cage home is heavier than they expected so it can be rebalanced early. New arrivals, illnesses, and vet-advised changes get announced and written down the day they happen, not folded in silently, so the shared understanding never quietly forks into two versions.
Keeping one shared version as knowledge grows
Your partner will learn things you do not know: that one rabbit eats better from a plate on the floor than from the bowl, that a guinea pig wheezes slightly when the room gets dusty, that the hamster emerges earlier on quieter evenings. That knowledge belongs in the record, not in one person's memory, or the household is back to single-point failure the next time someone travels. Review the routine sheets together every couple of months and after any vet visit, edit them in place, and remove anything outdated so trust in the sheets stays high. If the living arrangement later changes, the same sheets become the departing or remaining person's complete briefing without a scramble. The sheets remain the household's one version of the truth, while the relatives you select can open a small pet profile you have shared with them through KinsLe Family Sharing.