Hello, I have a pair of Australian Cattle Dogs that I am planning on breeding. I have a slate female, 45 lbs, 1 year old, going into her third heat cycle soon. Her mother had 10 in her litter. I have a red male, 25 lbs, almost 6 months old, who I plan to have as her mate. His mother had 6 in his litter. My plan was to take them in for a pre-breeding check up at the first sign of her heat/or in 2 weeks, whichever happens first. I figured if he wasn't mature enough this cycle then next cycle would work out, but I know I need to plan ahead in case he is mature this cycle. My husband has experience with chihuahua breeding when he was younger, but not medium sized dogs with possibly larger litters than 4. And I have only some experience from when I worked at a vet part time. Tips or advice would be much appreciated. And here's a picture of the pups.