Most cats that are neutered are not normally off their food for more than a day. You should contact your vet if your pet does not eat for more than 24 hours after surgery. 2) Exercising your cat after neutering: It takes 7-14 days for castration wounds to heal after surgery.
L-Glutamine is a supplement which contains an amino acid. It is most commonly used by bodybuilders and endurance athletes, to help them build up their muscles and lose weight, but there have also been a number of research studies which show that glutamine is linked to intestinal function. It is most often recommended for diarrhea.
You're right to be wary of laxatives; with over-use, laxatives can damage the intestines, cause dependence, and actually worsen constipation. An exception is bulk-forming laxatives like oat bran or fiber-rich supplements such as Metamucil, FiberCon, and Citrucel, which are safe to use occasionally. However, fiber supplements can cause bloating, gas, or cramping at first and they can also lead to diarrhea, dehydration, or dependence with continued use.