Okay, so where does it say that a female can get pregnant twice in the same heat cycle? I know that different male dogs can mate with the same female, but only one will actually be the father. I have not seen any clinical research that says a female dog can get pregnant twice in the same heat cycle. There are fish and frogs that can do that and even certain species of birds, but I never read that dogs can. Peggy -------Original Message------- From: Robin Gordils Date: 8/7/2013 6:05:16 PM To: Chihuahua Groups Subject: [Chihuahuas] The Normal Canine Estrous Cycle http://www.vetmed.lsu.edu/eiltslotus/theriogenology-5361/the_normal_canine htm
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