Hi Jen,

Do you regularly go to the racetracks? Keep in touch and speak to experienced greyhound owners/trainers? That would also be the best place to learn rather than take advice 100% from people on the forum, as it is hard to suggest things without seeing the greyhound in the flesh.
Are your boys familiar with greyhounds? Was your ex a greyhound trainer? Just checking the degree of experience that you have ;-)

Best of luck!