New pups with older dogs

savransky1

We rescued 2 Pit Boxers mixed-females at 4 weeks old. We have a 12 year old Lab-male and a 4 year old Poogle-female (Poodle Beage mis, that actually breed them that way) The puppies are 7 1/2 weeks old now and the older dogs still want nothing to do with them. I understand the lab is old and doesn't want bothered but the Poogle is still young. She wants to bite them. Can anyone give us any advice on what to do?