
Hi,
What a shame :( - you can find more info on www.baytril.com, but it does seem to be OK for pregnant bitches from the little I've read.
I would agree with the other posters - the stud has done his job, there were 3 puppies born even if only one is surviving, and no saying what the reasons were. No doubt that the stud fee is payable, and a puppy was the agreement.
All your sister's friend can do is offer to pay the equivalent stud fee/price of the puppy and hope that the stud owner is either sympathetic or doesn't want the sex/colour/quality that remains.
Easy to be wise after the event, but one very good reason to ensure that stud fees are ALWAYS paid up front - no way I would go through the hard work/trauma/possible expense of a whelping and have someone else with first call on the results.
Hope it works out well and she gets to keep the pup.
Marina