I had the same problem when I was posting for my puppies, I even got nasty emails as well. Dont give up, keep on going, soon or later there will be no flag and you will eventually get some claims. I had 8 pups, Bassette mix, and I was also posting to rehome the Mom. 2 days after the last post I did, someone came and got all 8 pups. I still have Mom and she is still up for rehoming. I did ask for $75 for the rehoming fee for the pups but mom had to go free. I turned around and let her have all 8 for free since she had proof of vet appointment and everything and was getting their shots, worms, and getting all of them fixed. She wanted Mom too but Mom disapeared when she came by. If no one claims mom soon, I just email her back and let her know and she will come and get her.