Huh. I just took a look at pubmed for the research showing early spay increases risk of spay incontinence, and it’s not clear. Several studies have found no connection between pediatric spay & incontinence.
I did find this study really interesting, though:
@Dreamwarmbloods perhaps an ovary sparing spay would thread this needle for you? No messy cycles or chance or pregnancy. Your puppy would keep her hormones, which is presumably why the breeder wants a later spay.