Help save Baby Maverick

Baby Maverick is 6 months old and has had medical issue since 4 weeks old when we lost his brother! I have spent THOUSANDS trying to get things figured out in the last week he has been to the vet twice and we spent just under $1000. We have no answer. He also had a fever of 104.5 became extremely lethargic and everything so we’re going to an internal specialist. I’m not made of money, but I’m doing everything in my power to get him everything that he needs so we can figure something out. Every single dollar helps because he is such a sweet boy and he deserves everything but this journey has not been cheap!