Well they go into heat at 7 to 8 months of age they spot for 2 weeks and are in heat for 3 weeks that last week of no spotting they are more acceptable to getting pregnant but I would not breed her on the first heat due to she is not matured enough and grown enough . I would breed on the second which will either be 6 months after first or 1 yrs. Some dogs are different some come into heat every 6 months or just once yearly. When you do breed her and she is pregnant feed her puppy chow that will help her and the puppies.
Usually the best time to mate female are at 2 years of age.
If people are not going to give advice about the question there asking and start bad mouthing the question then please don't com.... If people want to breed their dogs that's their business... Thank and GOD BLESS....
You can buy dog fertility test sticks . Which you wet with the bitches urine . These tell you when she is ready . This period is usually about fours days , near the end of her heat . She will not go out of heat when she catches , so don't look for signs . When its been four weeks after , you can use a human preg. Test to see if she caught . A vet is always a better usually , but finding out if your bitch is pregnant before you go can save you up to 400.00 . (I have a breeding female who just had 5 puppies yesterday !) (shih Tzu )
In first phase of heat your pet will get attracted towards its male. At the end of this phase on almost eleventh day it will become receptive to male. Second phase is actual fertilization phase. In this phase discharge color will be changed to light pink and swollen vulva will be soften. This stage last for five to nine days and female is ready to breed in real sense. Yes it can sometimes last for 20 days but not very often. When this stage ends up female does not accept male any longer. So last days of first phase and through out out second phase there are chances of its getting pregnant.
Oh my god your excited about the money she can make you ! Don't even consider even mating her until she at least 2 years, she wont be physically and mentally old enough. Did you get this girl for a pet or as cash machine ?I don't get at any one who breeds as I do it myself but I also care about my dogs and wouldn't put them in danger everbreeding is a big thing and can put you more out of pocket than in it .please look into this more, its not just about putting two dogs together and bobs your uncle ! It takes careful planning .