I have 4 groups of 1.4 pumping out litters for me after a month and a half of waiting. One of the groups had 20 pinks that are now about a week and a half old. That same group just had another litter of 12, 2 days ago and I noticed that the new pinks were always completly shut out by the 11 day old pups and I was worried that they would just die off. Ya know the whole survival of the fittest thing. Anyways I took the new litter and threw them in with a nother breeding group that also has a new litter of about 15 and the foster group accepted them as their own. Just wanted to post up that info here incase anyone ever wondered if that would work. Has anyone else done this?