How to calculate my dog's due date after an uncertain mating?

Question

Yes, my question is. Daisy got tied up with my male on Nov 25, 2017! She is having signs of pregnancy. I have done lots of research and I am having trouble figuring out her due date. I do not know if they tied before that or not and I do know they did not any after the 25th. So my question is when should she be due and how far should she be right now? I have calculated she is right at almost 8 wks. I have checked by the calculation online and put in the 11/25/17 and get different dates! Pet's info: Dog | Chihuahua | Female | unspayed | 1 year and 5 months old | 8 lbs

Lindsey Edwards MVB, BSc, IVCA · Accepted Answer

Yes, she is showing some signs of mammary development but an ultrasound scan would be required in order to confirm true pregnancy. I also make her 8 weeks this weekend and generally pregnancy is expected to be 63days so she would be due next weekend at the latest. Timing can vary especially when you are unsure if she could have mated earlier and also both eggs and sperm can survive up to 5-7days before conception so there is potential for her to whelp slightly earlier or later than anticipated but by no more than 5days as a rule.

How to calculate my dog's due date after an uncertain mating?

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