I've got a couple questions regarding breeding this upcoming spring...

I'm going to be borrowing a female flame from my parents for a couple months to breed to one of my two albino males (one erythristic, one not but still with noticeable red on him).
The regular albino is about 4 years old, and is a typical size for his age. My erythristic albino is about 3 years old. He's as long as the first one, but very thin (not as in underfed, just generally small; his head is even small for his size).

What are some thoughts on whether it would it be safe for him to breed? Would he be less likely to be able to father a litter than the larger male? Should I put her in with the plain albino after she's been with the erythristic just in case?
I'd really prefer to breed him since I think an erythristic albino and flame female would make a beautiful litter, but if it isn't safe I can always see what I get from the plain albino.