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How to keep raccoons & possums away from my cat flap at night?

Updated on September 23, 2025

Pet's info: Cat | American Shorthair | Male | 4 years and 7 months old | 21 lbs

A racoon or possum may be showing interest in my cat flap door that is installed in storm door,... is there anything I can put there over night when closed to repel? Will lavender branch or rosemary or mint keep them away? Will keeping outside flood liget keep them away? Any suggestions or experience will be greatly appreciated. I love in new jersey usa. Thanks and blessings to all there.

1 Answer

Most Helpful Answer

Jessica Desrosiers

Answered By Jessica Desrosiers

Veterinary Technician

Published on October 16, 2019

If the flap isn't in use you can cut a piece of wood or cardboard to the size of the door and slide it into the ridges around the flap (it looks like there are inserts for this from your photos). Making sure to keep all food picked up and away from the entry and outside can also help deter curious critters from poking around any more and the light may help. I haven't heard of lavender, rosemary, or mint deterring raccoons, (peppermint sometimes works with rodents) so I would avoid that as it may just attract more curiosity.
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