I have a mother and son who mated when the son dug his way under two fences. I took the bitch to the vets the next day for the start of her injections.  That was two weeks ago. I questioned the vet on what happens next and whether her season would continue, restart or stop as I have not used this injection before (never had such a determined dog before). The explanation that was given was that the eggs would not be able to lodge in the uterus. I asked when would it be safe to run the dogs together again.  I was told a few weeks. So tonight I let them all out together. Kept an eye on them for half an hour......nothing happening...not interested in each other...just all the dogs playing, sniffing around the yard etc.  I go out about an hour later and they are tied.......buggar. What to do next?????

Go back to your vet and explain that you didn't wait a few weeks as advised previously.

What was the drug that was injected? We have one (called Alizin in the UK) in the UK that is best given as 2 injections 24 hours apart when the season has finished so there's no chance of the bitch being mated again.

If she only had Alizin 2 weeks ago, it was far too early to let them together again.  I waited a full month when I had a bitch that mismated.  So, only waited the normal time that I would for any bitch in season (that I didn't want mated.)  But you start counting the days from the day of injection.

And before anyone says that keeping them apart for 4 weeks is too long, my answer is rubbish!  I have had a bitch mate on day 28.  My vet said she couldn't possibly be pregnant.  She whelped successfully!

The vet did advise to wait two weeks to be safe. I waited 15 days. He did say 10 days is the least but wait 2 weeks to be sure. Yes it was Alizin and yes it was given in 2 injections 24 hours apart. He told me that the injection can be given up to 45 days after supposed mating. I explained to him that the bitch is obviously still in season and was ready to be mated to an approved stud and would this injection make the mismatch mating unviable and still be able to use the approved stud (i was trying to understand how the drug works). He said no mating would work.  Then why were they tied when I went out to see them????? Are the same smells released but not the eggs??????

After Alizin you will quite often notice that the season continues for much longer than it would have done, 5 weeks in the case of my bitch. So I'd still take care to keep her away from male dogs until she has finished completely. The makers DO state further matings should be avoided. http://www.noahcompendium.co.uk/Virbac_Limited/Alizin_30mg_mL_solution_for_injection/-57089.html

Thanks for that info Goldmali.
It would have been good for the vet to read it too it seems. He inferred that it would sort of stop the season.  I think I will ring them tomorrow and arrange another consult.  When the first mating happened she was near the end of her season the way I worked it out.  But if it is the case that the season goes for longer then I dont know. She normally is ready for mating at around day 15. He son managed to get to her at day 28 and she accepted him. So now second mating has occured at day 43????

My friend was told by her vet that it was ok if the dogs mated again after the Alizin jabs (aand her dog did mate her bitch once again, no litter resulted).

Poor husbandry for your friend to let them do it again. Crate her or keep her with you

Not really when she had been told by the vet that is was safe to do so.

Actually no; she says the vet had told her to wait a few weeks, not two weeks. 'A few weeks' is surely more like 3 or 4 weeks, not just a fortnight.
"That was two weeks ago. I asked when would it be safe to run the dogs together again.  I was told a few weeks."

> Actually no; she says the vet had told her to wait a few weeks, not two weeks.

Most recent post but last, she says: "The vet did advise to wait two weeks to be safe. I waited 15 days. He did say 10 days is the least but wait 2 weeks to be sure. "

Not really when she had been told by the vet that is was safe to do so.

Unsupervised matings are NEVER safe, whether they result in pups or not.

>Most recent post but last, she says: "The vet did advise to wait two weeks to be safe. I waited 15 days. He did say 10 days is the least but wait 2 weeks to be sure. "

Giving accurate advice is made more difficult when the story changes along the way ....

So its fine to allow two dog that are not allowed to produce a litter for whatever reason close relation different breed age etc etc to mate just because a drug has been administered. Or is it not better to learn your lesson and KEEP THEM APART! How can you possibly say not really? If this happened to me it would be a crossbred mating or father to daughter so but if either bitch has the jab and the mate again, but its fine to do so as she won't get pregnant?? Ridiculous statement

"Not really when she had been told by the vet that is was safe to do so."

"Unsupervised matings are NEVER safe, whether they result in pups or not."

Who said it was unsupervised? 

"So its fine to allow two dog that are not allowed to produce a litter for whatever reason close relation different breed age etc etc to mate just because a drug has been administered. Or is it not better to learn your lesson and KEEP THEM APART! How can you possibly say not really? If this happened to me it would be a crossbred mating or father to daughter so but if either bitch has the jab and the mate again, but its fine to do so as she won't get pregnant?? Ridiculous statement."

Tell her vet that then.

Who said it was unsupervised?

Fair assumption as why would two people (and in some cases 3) waste time mating two dogs where no puppies are wanted or expected from the mating? It's hard physical work mating dogs, backbreaking! Even with toys. And if left together they can end up mating many times each day so unless somebody was with them 24/7, yes there would be unsupervised matings. Way easier to separate them in other words.

Even without the hard work and risks of injury. Is it not morally irresponsible to allow two dogs you dont want to produce puppies together mate? Im not personifying at all btw but find that kind of attitude has no place in the world of dog breeding.

"...find that kind of attitude has no place in the world of dog breeding." The whole point is that, because of the Alizin, they're NOT breeding. My last word on the subject.

The point is that Alizin is not meant to be used as a contraceptive for lazy dog owners.

Like Goldmali!

They must just enjoy watching dogs mating then?!

>Who said it was unsupervised? 

The OP did! These are the exact words. 

So tonight I let them all out together. Kept an eye on them for half an hour......nothing happening...not interested in each other...just all the dogs playing, sniffing around the yard etc.  I go out about an hour later and they are tied.......buggar. What to do next?????

> The OP did! These are the exact words. 

But under advice from the vet, who apparently advised that 2 weeks would be enough? You can't blame the OP for that surely?

And the original mating occurred after the male dug his way under 2 fences. Would most people consider 2   fences to be enough of a barrier? If not, then yes I agree not enough precautions were taken initially.

at my house no lol storm would just as many fences he could to get to a bitch inseason :)...we had to crete both 1 out then the other in NEVER able to get to each other and the cretes were put in the livin room so we could keep an eye on them too! glad our girls are spayed now lol

Just to let everyone know that no puppies resulted. She is in season again and her son is now staying at his Aunty Naz house until the end of her season plus a fortnight.
Many thanks for your help and knowledge. 
BTW the arguing amongst yourselves was the most amusing.