No, that is not true, Inkspot. Actually, from my experience, the sooner the better. Tubby was done as soon as the vet would allow it, and I've actually heard that if you wait until they are 1 year or older, that's when you have problems with them continuing to spray and such. I would check with your vet for specific details that pertain to you, but there is no reason to wait until they are that old.