Indeed, there are numerous references to undescended testicles and increased cancer risks (among other possible health concerns). I am listing links below, please visit them and read up. As heartbreaking as the idea of no puppies from your dogs seems, it is far healthier for your males (and their progeny) to have them neutered. This is a painful, and genetic problem that is 100% rectified with neutering. Also note that if a dogs testicle is still undescended after 4-6 months, that it will likely never drop. It also will not produce sperm, due to the elevated temperatures, and is prone to herniating. Good luck! (Also, as for his breeder that says it will drop, since it is genetic, she should be correctly informed, as that breeding should not be repeated. If she sold him under a contract, please look at it. You may have some options!)
Links:
http://www.findlay.edu/users/brennan/eqst232/sp01/bremer/
http://www.upei.ca/~cidd/Diseases/urogenital disorders/cryptorchidism.htm
http://consumer.vetmedcenter.com/consumer/display.asp?fn=P-MR-R-Re_A-abnrepromaledog1PR.xml&dt=A
http://vetmedicine.about.com/cs/diseasesall/a/neutering_2.htm
>>We have the same problem with our one and a half year old golden retriever, Finnegan. He is a very good looking dog and has been commented on repetedly by many people.
>>I asked my breeder about this problem and she said that it WILL drop eventually and all we need is patients. Are you SURE that it's a cancer risk?
>>*sigh* my hopes of showing& maybe someday breeding him may have just been flushed.
>>
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>>Sara,
>>Owned by...
>>Macintosh, and Finnegan
>>
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Midas the Golden Child