I can't help with the genetics of it....


but if the friends wants you to have them, is there a chance the friendship will be strained if you refuse?

If there is a situation behind it, like the friend needs funds now, and has to part with animals...but doesn't want to... So they pick someone they know will care for them...

I would do it. If you have what they are asking for, and it won't cause you a hardship money wise, then I would do it.