Congratulations on your new arrivals, pictures would be lovely
...Winter Whites are unbelieveably cute
Are you planning on keeping them all together, as two male/female pairs or single sex pairs. Have they been living together previously or are you having to introduce them carefully? I'm interested as I have two winter white brothers and I've been doing everything I can think of to keep them from fighting (so far everything is ok but it's early days yet!) and yours obviously aren't related as you are planning on breeding.