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Does my cat's dry food spoil in summer? Can I reuse leftovers?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 8 months and 28 days old | 10 lbs

Hi I notice the heat is coming and summer will be coming soon. Do you have any advice when it comes to my cats dry food. Will it rotten faster? Is it wrong to put back the left over dry food into the dry foods container? Do I throw away the left over? Anything else helpful would be great thanx.

2 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 26th, 2017

Hi there! Dry food isn't a concern with being left out, it's the wet food that's a problem. In the heat, that can certainly go bad quicker than it would in the summer. It's absolutely fine to put the leftover food back into the dry food container. I leave food out for my cats all the time, I use a self feeder and I haven't had any problems with the food rotting whether it's summer or winter :-)

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    Answered By C. Rathjens, DVM

    Veterinarian

    Published on

    Great question, particularly for southern California! If Luna food's is inside you don't need to change anything. Assuming it's outside, here are a couple thoughts. There are more wildlife animals around in the summer, so you might attract unwanted friends more. There are also more flies and the food is more likely to get maggots if left out for a long time (but this is less likely with dry food vs wet food). I recommend always throwing away food Luna doesn't eat after 24 - 36 hours and putting out new food to keep in fresh. If possible, keep the food instead to prevent bugs and other critters from getting in to it, but don't fret if it must be outside. Enjoy the coming warmth!

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