Why is my cat peeing outside litter box since changing food?
The only way to definitively determine if the food is responsible is to switch him, gradually, back to his old diet and see if his litterbox habits return to normal. If so, you have the option of keeping him on his old food, just feed less of it and increase his activity to facilitate weight loss.
Survey the area around the home for any negative stimuli that may be causing stress. This may include recent changes in the home (furniture rearranged, new flooring, etc.), high traffic, loud noises or even feral cats outdoors that he can see through a window. A pheromone product, such as Feliway Spray or plug in diffusers, may help decrease any stress or anxiety. Additional litterboxes may also be of benefit. Use an enzymatic cleaner, such as Nature's Miracle, to thoroughly clean soiled areas.
If the behavior persists or worsens (bloody urine, straining to urinate, change in thirst/urination), then Azazel should be physically examining by your veterinarian to diagnose any underlying medical causes.
Updated on September 23rd, 2025