
The pups I bred are 18 months old now, all keep in touch by e mail, some every week :-) others every 3 or 4 months, every one is different. Apart from one couple, they actually got a puppy I got back at 4 months. They e mailed once to say he had settled in, then nothing. I still sent e mails to them of any news I had, but got no replies. Then I got a lovely phone call last week, saying how wonderful he was, they thanked me for sending them my news, made me so happy, I felt I could relax about him now.
Hopefully your pup will be fine, maybe they are on holiday. Puppy Party sounds fun!