three days ago we found a lab mix puppy that was dropped off in our area. There were three puppies, which have been placed in good homes. Hematit (Mati) was taken to the vet today, for her shots and a check up. Over the last few days she has been sleeping a lot, vomited once and had diarrhea. The vet tested for parvo which showed negative in the CBC and Stool testing. But the CBC also showed platelets of 13,000. We are starting antibiotics tomorrow, but the vet is unsure why a puppy (less then 12 weeks old) would have such low platelets. She was sure it was parvo. At no time was Mati's temp taken, heart listened to or anything. Just the blood test and stool sample. Now the vet called saying we should get additional test to rule out more serious problems, I.E cancer because her platelets are low. She actually saw zero platelets when she did a smear test, but when it was sent to a outside lab, it showed 13,000. Mati, has been adjusting to losing her mom, sister and brother as well as a new home and routine. She eats well, drinks water, plays quite a bit and sleeps. She has no bruising, no red spots on her gums, or other signs of low platelets. Any advice would be appreciated. We are willing to go to another vet, but if she should start antibiotics asap we do not want to waste another day. Although she has only been in our home a few days she is apart of our family now.