Moving in August presents some problems. One, there isn't time for the six months after the vaccines and blood test required by PETS. Another, many airlines won't ship pets if the temperature is over a certain amount, and August in Oklahoma is likely to be above that.
Either way you are going to have to leave him behind for several months then ship him over separately. That's going to cause extra trouble and expense which you should calculate. And be sure to figure how big he is gong to be in six-months, since shipping charges are based on crate sizes, and the crate has to be large enough for him to stand up and not touch the top of the crate.
