Ok, the best option is to keep feeding the cu daily until it bonds.
Firstly, just to eliminate the obvious bonding problems... are you *certain* you fed the pup when you tamed it at the beginning of the 8 days?
Do you get any messages on screen when you feed the pup? Other than the pet is happy message
I've never tried bonding a pet when a publish or anything went to the shard I was playing, so I'm not sure if things like that can effect pets during the bonding timer, ie losing a day. At most it shouldn't lose more than a day if that is the case though.
I'd try feeding it again later on today, then tomorrow and with any luck the pup will bond for you in the next day.
Wenchy