I went and saw the Critter today and he look completely different than he did on Sunday. He was walking about, wagging his tail, and even stood up on his hind paws so that he would be picked up. He was not as lethargic as he had been in the past four days, and much more awake and active.
The doctor said that there is a small chance for recovery. While the last transfusion did not elevate his white cell count to normal numbers, a second transfusion might do the trick. The vet explained to me that the second transfusion might kick-start his medulla a get it to start producing white blood cells again.
I want to thank all of you from the bottom of my heart for all your prayers and thoughts. The only thing we need from our end are those same prayers you've so kindly said on the Critter's behalf.
God bless you and Merry Christmas.