Help Dexter Get the Treatment He Needs

Ryan and I adopted 2 8 week old double merle mini aussie doodles on July 7th, on July 11th they had thier first vet visit, they both have microphthalmia, my male completely blind but hearing, and my female completely deaf with 1 good eye. They were both microchipped on july 13th. The week of the 15th I gave them flea and tick prevention from the vet, credelio, Monday the 22nd I gave them interceptor plus, also from the vet. On Tuesday I noticed Dexter had bumps in his ears, not red or irritated. Wednesdays after work they were really bothering him and had blisters so I gave him drops of zymox, Thursday I noticed a large mass probably the size of a golf ball above his left shoulder, Friday he had a grape sized mass between his shoulder blades. We took him to an animal hospital where they thought maybe he had the MRD1 mutation and was reacting to his vaccines, the shoulder lump. And his microchip, the back lump. So they gave him benadryl and steroids and sent us home. By time we got home 40 mins later his ears were clear and he was settles down. Saturday morning I called the vet at 8am because his ears were blistered again. She had me give him benadryl at home. At noon he stopped using his back legs and was unable to get up. We rushed him back to the hospital where they ran blood work. He was dehydrated and had elevated while blood cells , his temp was 104.7 we decided to keep him there over night to get fluids and antibiotics. They did an x ray and withdrew some of the fluid from his shoulder which didnt show any bacteria.We went to get him today at 1 because his temp had gone down and the mass in his should was significantly smaller. On Monday the 29th we took him back to his normal vet due to a high temp, they kept him for the day and when we got him that evening he was significantly better, on Wednesday he started walking around and acting normal. Thursday was the downfall, the abscess on his shoulder had ruptured. We took him back to the vet where they cleaned the wounds and told us it was best if it drained he was fine until Saturday night, he was very restless and didn't sleep, Sunday he had amd elevated temp and the mass on his back had doubled in size and was oozing. We went back to the emergency vet, where we were told that in order to save him we needed to go to a specialist who had better resources than where we were. Ryan transported him almost 2 hours away to a specialist in Fort Wayne Indiana who is certain he can heal Dexter but in order to get him treated we have to have $3800. Anything will help, he isn't done fighting he eat drink potties and tries to play with his sister