Oh my...why post that last picture of the Black Eyed Siamese? There should be some kind of cuteness warning before posting such things. I'm so jealous of your BES and Burmese!
I thought I bred the dwarf rats out of my colony, bred two completely unrelated lines together and ended up with about 70% dwarfs. I'm not a huge fan of the dwarf genes in rats because I like the larger variety. However, for whatever reason, dwarf rats have such cute little faces!
I just have a Ruby/Red eyed line and an interesting Pink eyed line of Siamese. The babies are born orange (and I mean orange). They look like fawns as babies.