Quote:
Originally Posted by pstinard  I forgot to mention that the study includes data for 110 breeds of dogs for which there were more than 1,000 dog years at risk of data per breed. (Each year a dog was insured contributed to one dog-year at risk). The study included 1,959 female Yorkies, which is a very large number. Yorkies were ranked the 61st most at-risk breed for pyometra (which is mid-range for all breeds studied), 24th most at risk for mammary tumors (which is in the top quartile), and 36th most at risk for developing one or the other (high second quartile). IMHO, based on these data, the rate of pyometra for unspayed Yorkies (21%), the rate of mammary tumors (25%), and the rate of one or the other (39%) provide a compelling reason to spay Yorkies before the first heat, UNLESS they are being used as breeding stock, or have a health issue that would make the risk of spaying too great for a particular individual. |
Phil this study only looked at two cancers and looking at this study *only* and only two health concerns one could certainly conclude that for YTs; *females only* spaying is the way to go, also you and I know that for toy breeds as far as the research that has been previously posted here, give or take a 5% margin of difference multiple studies conclude the risk of pyrometra escalates with each unbreed season generally speaking. But the study doesn't as far as I am aware denote increasing risk for either pyro or MT for spaying at any age. The risk of mammary tumours has not been broken down - they did not compare to spayed females for example. But the risk does increase for all breeds of dogs as far as I can tell.
They did not make this at the minimum an all cancer inclusive survey - and I wonder why or why not?
And of course this is one study that needs to be like all others weighed against other bodies of studies.
Thanks again Phil for forwarding the PDF file :-)
As Misty said this is a study that only looked at reproductive issues and those only in females and not males.