There has been no safe proven or consistent method to induce heat in a female dog. Female dogs are in heat every six to eight months. Heat cycles last can last anywhere from two to four weeks. If you are concerned about your female dog about not coming into heat, contact your vet.
There are some medicines that can help with that. But you should discuss it with your vet due to the risks and if there are problems. Also its good to note that some of those medicines are not safe or proven to work. As i stated before talk to your vet about options to help your dog go into heat.
There are several medications that will bring a dog into heat outside of her normal cycle. The problem with all of them is that the dog may go in heat and not ovulate (produce ripe eggs) so she will never get pregnant. These medications can also disrupt the normal cycle so it never gets back on track.
There are medications to induce a heat cycle, but they are fairly dangerous and the dog may not cycle properly after the induced heat cycle. These drugs also tend to be expensive, and they can only be prescribed by a veterinarian. Most dogs will cycle naturally twice a year, approximately six months apart.
A vet can prescribe a hormone treatment that can make an unspayed female dog go into heat. But please be aware before you breed your dog. Shelters are already overflowing, so please don't add to the problem.
I would like to know what mg , of cabergoline and how many dosages a day , and for how many days , do i need to give my doberman females cabergoline , to make them get pregnant??? please let me hear some advise ??