Hmmm... I'd say the white in your roo is a fault. As black birds get older they can start to get some white on the tips of wing feathers abd if foot feathers (if they have them). But your guy is young.
Lavender is a recessive gene that you need two doses of in order to be lav. If you use your black roo to the lav hen all offspring will be black (unless he is carrying lav in which case you will get some lav offspring). All the black offspring will be carrying lav. Choose a black male and mate back to the lav mother. You'll get some blacks and some lavs.
But if your roo is carrying lav then you have a big head start. So use him with your lav hen to see what you get.
Blue is a bit different because it's not a simple recessive gene.
Lavender is a recessive gene that you need two doses of in order to be lav. If you use your black roo to the lav hen all offspring will be black (unless he is carrying lav in which case you will get some lav offspring). All the black offspring will be carrying lav. Choose a black male and mate back to the lav mother. You'll get some blacks and some lavs.
But if your roo is carrying lav then you have a big head start. So use him with your lav hen to see what you get.
Blue is a bit different because it's not a simple recessive gene.
