I have to agree with LJack, I'm afraid. If you want a puppy in August, that's going to be pretty tough. If you roughly calculate 2 months of gestation and 2 months of raising pups, you're looking at a breeding occurring 4 months prior to you getting your puppy. A bitch bred today will have puppies going home in September. So you're already late to the party for an August pup. Not saying it can't be done, but you're going to have to be both aggressive and lucky in your search.
Like most ethical breeders, we usually have a waiting list before our girl is even bred. But that doesn't mean that the puppies will go to those on the waiting list. We look for the best homes, regardless of when they contact us. Sometimes a late applicant jumps to the head of the line. So get your name in there where you can. Not all breeders put the home before the waiting list, but some do, so get cracking if you're set on August.
Otherwise, if you can be flexible in your timing that might work out better for you. I always advocate for patience over expedience. If you do get an August puppy, you will likely have zero choice. It will be a "take what you can get" situation. But if you're willing to wait, you can exercise more of a choice and get what's right for you.
Of course, sometimes that "take what you can get" puppy works out. My first show puppy was like that. I had submitted an application, but was told there was no puppy for me. Then one day the breeder called me up in a panic, saying, "Do you still want a puppy? If so, come over to my house now
. My ex-husband said he's on his way over and he's going to take the puppies away. So if you can come right now I will sell you a puppy." I dropped everything and went, and he turned into my first show dog and my bestest ever heart dog. So there's always a shot.