I'm in the same boat here with Cody. One of my two year old labs (who used to stay with us in the house) is back in because she is going into heat and don't need her to get pregnant. When she was in the house she kept climbing over the electric fence to get back into the pen with my three other labs (my house is too small for four big labs), anyway we put her back in the pen with them, but I don't need her out there in heat. So we brought her back in the house until she's done and can get fixed. Cody does not like her! he's scared of her of course 'cause of her size but she just sniffed at him and that was it. I'm sure in a week when she smells really good to him he'll change his mind

We'll see how it goes.
P.S. he is still intact, no we are not looking to have laborkies she wears a diaper
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Mommy of Cody,Gracie,Bella,2labs,1cat, 2 skinkids
one Angel Baby Boy

8/8/09 I carried you under my heart for 20 weeks and will carry you in my heart forever