when is the best time to mate your dog?

I also have a female pug. She's on heat every six months. To know when to have her mate with a pug also, count from day 1 of her period. The 9th and the 11th day of her period is the best time to have her mate with the male pug. That's what my vet said. So everytime she's on heat, I keep an eye on the date and bring her for stud. Also, to have healthy litter, you must make sure that your pug has been dewormed before studding and she should have maintain her vitamins and nutrients while she is on the family way. From the date of mating, count 55 to 62 days and she is ready to give birth to her litters, your vet should inform you when you should bring her for pre-natal check-ups. Also, keep her in cage so she won't miscarriage.