I believe we have two all black boys, one black girl (the littlest), a grey boy and a grey girl. I weighed them all and:
Black Girl (with a white spot on her belly) 3 1/2 oz
Black Boy 4 oz
Black Boy 4 1/2 oz
Grey Girl 4 oz
Grey Boy 4 1/2 oz
I might have gotten the sexes wrong, but thats my best guess at the moment.
The two black boys both have a favorite nipple... which happens to be the SAME nipple, the one closest to Meowmys face, and darn it all if they don't fight for that nipple! Little kitty paws flying everywhere, angry mews, pushing, shoving... you name it! Finally they realized there was another nipple close to Meowmys face and a -temporary- truce has been established.
It seems Salem is more protective of the little black girl than the others. When I took them out one by one to weigh them, she had no problems or concerns... until I took the littlest one and she left the others, came over and was meowing and tried to jump up on the counter to take back her baby. I wonder why she is more protective of that one, maybe because it's the littlest?