Just a baby! My understanding is that if you have blues and blacks it's not a good idea to mix them up with the coppers...or did you mean put him with BCM and blue coppers? He looks substantial for 5 months.
I have heard this too... and so i do actually keep everyone numbered so i know the parentage. I mix my blacks and blues in the same pen often, but if i want to make strictly black coppers then i just sort them out and only use the ones without blue parentage. I'm assuming he came from a blue copper line because of the copper leakage. I am really interested in seeing what shade of copper i get on the offspring, I love my blues right now but i would like to have a darker shade of copper on them. I really need to work on the black coppers right now but who could resist experimenting with him LOL!!!