How do I care for my cat after spay/neuter surgery, and when should I switch foods?

Quick answer

For about a week after surgery, your cat needs to wear an e-collar 24/7 to protect the incision site until the stitches are removed. After surgery, metabolism drops sharply, making weight gain much easier — once the stitches are out and your cat has recovered, gradually switch to a lower-calorie food formulated for spayed/neutered cats to prevent obesity.