im tring to breed my cocker spaniel

Question
how long is proper time to keep them togher,so he dont get atached to my family.


Answer
I am sorry, but if you had even started the research you need to do before breeding a dog, you would have that information and more.  Have you done research on common genetic problems in Cockers?  Does she come from a line largely free of them?  How has breeding of dogs from her line to his gone?  

Please go to www.akc.org and read their information on responsible breeding.  Then take a tour of your local shelter.  Take notes of the nicer dogs.  Go back in a week and see if they will say what happened to them.