OMGosh she is getting so big. How big is Sunny now, and how much does she weigh? I have to agree with everyone else, sort of. When I had my first dog, I am fairly certain that the accepted thought at that time (18 years ago) was that the dog should be spayed after her first cycle. I am assuming they thought there was some benefit to proper development to wait that long (sort of like waiting two years to get a large male neutered). However, it appears that that mode of thought has been replaced by "the earlier the better" mode of thought. I think Sunny will be just fine on Tuesday. A lot of pups are done before they are sent out for adoption (Ginger was spayed at 10 weeks).