Today’s photos are additions to a previous post written in 2013 about Tie Phenomenon in dogs.
The Tie Phenomenon (5/3/2013) - It’s the mating season for dogs again; and since females dogs (bitches) mate twice per year, we are no strangers to the Tie Phenomenon. This Phenomenon occurs when dogs get stuck together from 15 minutes to an hour. I understand that during mating, a dog’s penis will only become swollen and erect when it is […]
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Anyway, below are the photos of our more recent dogs mating.
When dogs mate they form a genital lock during which the penis is so swollen within the vagina that the pair cannot separate.
This getting stucked (or locked, or knotted) during copulation is called a “tie” known as the Tie Phenomenon.
The tie is also referred to as the mating tie and copulatory tie.
During copulation, both dogs will get locked from their rear ends and will normally turn their backs to each other.
The mating dogs will stand nearly motionless for a period lasting from 5 – 30 minutes.
If there is any movement, it is the female, most times, that moves about due to pain, panic and various other reasons.
The female dog may also turn around to clean herself after ejaculation is complete.
I read that owners should never try to separate their mating dogs since both dogs may get hurt if you do so. Both dogs will separate on their own, without any intervention.
However, in Jamaica, some persons will throw water at mating dogs to successfully separate them.
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UPDATE:
Our dogs were at it again, mating at the end of July through to the first week of August. Approx. 200 days since the final date they last mated.
Even their 20-week old puppies were spectators of this Tie Phenomenon. 
At the request of a few readers, we include the following photos of the male dog after copulation.
Then nine weeks later, on September 29th, our dog had her second litter of puppies.
This time around, instead of eight, our dog had four puppies.
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More reading:
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Suz and Tell 