Automatic litter boxes for large cats

1. Published weight range is a screening tool

Litter-Robot 4 currently publishes a 3–25 lb range. Neakasa M1 Plus publishes roughly 2.2–33 lb. That makes M1 Plus more permissive on paper for very heavy cats, but it does not prove every 30 lb cat will prefer it or every 24 lb cat will fit Litter-Robot comfortably.

2. Opening and posture matter more for long-bodied cats

Whisker publishes a 15.75 × 15.75 inch entry for Litter-Robot 4. An open-top product such as M1 Plus avoids a front doorway altogether. If a Maine Coon or Norwegian Forest cat already dislikes covered boxes, open access is a stronger signal than a small difference in device weight or app features.

3. Acclimation can invalidate an otherwise perfect spec sheet

A robot that the cat refuses to use has zero practical value. Keep the old box available during transition and avoid forcing the cat into a new enclosure. The manufacturer guidance for Litter-Robot specifically recommends a gradual transition.

4. Measure the room too

Large automatic boxes require clearance to open lids, remove drawers and perform cleaning. A device can fit the cat but still be a poor fit for a narrow bathroom or laundry room.