One of my favorite homemade conditioning mixes is simply wheat germ and Lewis Lab Brewer's Yeast Flakes, mixed 50/50. I feed to males while I am bringing them in and to the pair once caged together. I like to wait on offering to the hen till she is close as strong wheat products are a push toward egg laying.
I have also used Harrison's High Potency Mash for conditioning for many years. I mix it 50/50 with Petamine Breeding Formula (unfortunately Petamine is no longer available). I have enough Petamine to keep mixing it this year. I find the Harrison's to be somewhat fattening if over fed, note the recommended dose is 1/2 teaspoon per bird. I also add it to my dry nestling food that I keep in the cage for feeding hens and add some to my regular egg food.
