Top, if your post was directed at me, I never said coyotes and dogs cold not breed, I said it is rare outside having human help. The idiots in LA are known to tie a domestic bitch in heat up in the foothills hoping a male coyote would breed with them, I wonder how many got killed in the process. This is what I was trying to say more or less and I was not arguing with anyone but refering to the grand scheme of things that it is not common. no argument existed here, just a conversation!
Urban Coyote Research
Urban coyote ecology and management, Cook County, Illinois
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Do coyotes and dogs interbreed (mate with one another)?
People often speculate as to the frequency of coyote-dog hybrids, or coydogs, in urban settings. Coyotes and dogs are related, and they are biologically capable of producing hybrid litters. Coydogs have been raised in captivity. Genetic surveys of wild coyotes have rarely documented evidence of dogs in the genetic makeup of coyotes, despite domestic dogs and coyotes sharing the continent for the past 9,000 years. Although it is possible, coydogs in urban settings are unlikely because:
•Coyotes are highly seasonal breeders; dogs are not.
•Coydog females have a shifted estrus cycle that does not coincide with the coyote period.
•Domestic dog and coydog males do not tend to litters, whereas male coyotes do.
•Coydogs may have lower fertility than either domestic dogs or coyotes.
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