Are there cat door options for renters that do not require permanent installation?
Yes, a sash window insert fits into an existing window opening and can be taken out when you move. Always check the insert's fit range for your window, and if it faces outdoors, look for insulation and tight seals to limit drafts. For indoor access, an interior pass-through or a door prop keeps a doorway open just enough for your cat without drilling or cutting, which is handy for litter or feeding areas.
How can a cat door help manage a home with multiple pets?
A selective access door that works with a microchip or collar tag can be set for specific pets, so only approved animals can go outside or enter restricted rooms. Indoors, an interior pass-through or adjustable door prop can allow cats into litter or feeding zones while keeping larger pets out. For added control, a locking flap with in-only or out-only modes can help you manage traffic without constantly watching.