
Well give me another week or so and hopefully I will know myself as I didn't get a tie with my bitch, and keeping fingers crossed. the tie is a combination of the dogs gland swelling and the bitch spasming and causing a tie.
The dog usually ejaculates in the first couple of minutes while thrusting before the tie. During the tie it is mostly prostatic fluid that is ejaculated so a pregnancy may result from a slip mating. The difficulty is knowing if there was ejaculation, whereas with a toe you know that it has already occured.
When semen is collected from a dog the dog does not start to try to turn until he has already ejaculatd, and the vet may or may not collect the prostatic fraction depending on what the sample is needed for.