The down side of having only 2 birds is that the stable shelf life of chicken feed is only about 6 weeks. After that time period, the nutrients start to break down. So, if you're of the mind set to get more birds, I suggest that you get your coop in place and add to your little flock. Recommendations:
Look at Henderson's chicken breeds chart
Get all of your birds from the same source.
Read up on some of the many integration recommendations. Azygous is the queen of early integration. Aart also has good advice.
Coop and run space: avoid the pre-fab doll house coops. They are of poor design, cheap construction, and not built with the needs of a chicken in mind. They lack adequate space (manufacturer grossly misrepresents his product's capacity), as well as lacking adequate ventilation, roost space, or height to be able to manage litter effectively. The roosts are often too skinny for comfortable perching, and too close to back wall and ceiling, placing the bird at risk of frost bite, as well as wearing their tail feathers when they perch at night.
Recommended space for back yard flock is 4 s.f. in coop, and 10 s.f. in run per bird.
Enjoy your birds!