We took our 7-year-old Pomeranian Chihuahua mix to Wellsboro pet complex for a routine teeth cleaning. He died within two days of the procedure. We had given them copies of previous medical records in advance and asked them to call his previous care givers as he had Squamous Cell carcinoma on his ear tips in 2015 and they had been surgically removed. He had Pericardial Effusion I 2016 and that had been drained. We thought we were being careful due to his previous medical issues and requested the pre-anesthesia blood work.His dental was completed within 1.5 hours of us dropping him off and we thought that was a record. We moved here from Virginia and there a dental took about a half of a day. When we got there, we were informed that he was anemic and had no countable platelets. They indicated they wanted to keep him overnight for observation. We agreed.We picked him up Saturday June 3, 2017. We arrived around 2:30 PM and had to wait for a vet to get there. We were told that the anemia and low platelet count could be due to an infection or an auto immune disease. We were told to keep him quiet and restrict and activity. We took him back to the hotel where we were staying at the time, in Corning, NY. He ate normally that night and went to the bathroom. He laid on the bed and rested quietly all night. I took him out to the bathroom around 7:00 AM and he appeared to be OK. I went to get items for breakfast and while I was on the road back to the room, my wife called and said he could not stand and appeared to be deteriorating. We called the vet and were told to bring him to the office, a 50-minute trip. When we got there, he had a seizure. The Dr Shaw, who had done the dental, was there to release another animal and we spoke to her. At my wifes prompting she agreed to give him something to help with the seizures and informed us that they could do nothing else to stabilize him and that we should go to the animal hospital at Cornell University in Ithaca, NY. She indicated that there was a good possibility that he would die on the way. We left immediately and drove there.He was a full-blown seizure by the time we got there and they started working to stabilize him and prepare for a transfusion of platelets. There just was not enough time at this point and he died before they could start the transfusion. Blood platelets are stored frozen and must be thawed to be used. This process took longer than he had left.We subsequently found out that they had anesthetized him and started the dental procedure before the results of the blood test came back and they had not contacted the other vets as we asked, but they had not even looked at the records we dropped off over a week before. We also found out that they had contacted specialists post dental and knew that it was probably IMTP on Friday. We were only told about this at Cornell University on Sunday June 4, 2017.Had Wellsboro pet complex looked at his records and waited for the blood work to come back they would have known there was cause for alarm. They should have called us about the results, not done the dental, they should have told us about the suspected IMTP and sent us to Cornell on Friday June 2, 2017. When we called on Sunday June 4, 2017 they should have sent us to Cornell immediately rather than have us drive to their location and waste over two hours.Dr Shaw appeared uncaring to us and has never apologized or offered condolences. Dr Kreiger has refunded the cost of the dental procedure and helped with the bill from Cornell as well as apologized and sent his condolences.We think it would go a long way to prevent this type of tragedy if they would create a check list where they record every step of the normal process with a section where they would inform the owners of the patient of any abnormalities before starting a procedure. After all, the blood test is advertised as a pre-anesthesia blood test. This indicates that no only should the blood be drawn but the results sho