Mice are small, social and easy for a generalist service to underestimate, so begin with direct experience: how many mice the staff have cared for, and how many mice board at one time. Then look at the cages with a prey animal's eyes. You want very narrow bar spacing a mouse cannot squeeze through, a quiet room, and no smell of cats or ferrets drifting in, because mice live by scent and stress quickly around predators they can smell but never see.
The Colony Stays Together
Supply your own staple food and nesting material, and state plainly that a group of females travels, boards and returns as one colony. Mice organise themselves around familiar scents and companions; splitting the group or returning a mouse smelling of another colony invites fighting at home. Ask how the service cleans a cage without stripping out every trace of the colony's scent at once, and where the group will sit in the room relative to other boarders during the stay.
Security, Water and Quiet in Person
Check each enclosure for secure fastenings, clean dry bedding, and fresh water, and confirm predator pets have no access to the room at all. Look for a corner away from barking and constant foot traffic, and ask how often water bottles are checked, since a blocked spout harms a mouse faster than a missed meal. Small size also means small reserves, so daily checks need to be real observations of eating, movement and breathing, not a glance through the bars.
Daily Checks, Vets and a Trial Stay
Ask how appetite and behaviour are monitored each day, which exotics vet the service uses, what happens in an emergency, and whether a short trial stay is possible before a long booking. Leave an emergency contact who can authorize veterinary care, plus your written routine for feeding, nesting and handling. A service used to mice will answer the colony and bar-spacing questions without pausing; hesitation on either is information worth weighing before you commit. Ask, too, how a mouse that is hunched, thin or breathing fast would be separated for observation without being left entirely alone and scentless in a strange cage.
A Handover Sized for Mice
Write the colony's routine down in full, including who lives with whom, and keep a copy at home so you can check the group over on return. Care Pass in KinsLe creates a short-lived link for the stay: the colony's feeding and nesting details are shared for that window only.