"She was spunky and she was adorable and just full of it. And the cat wasn't really impressed with her, but they were making friends," Julie Tillson said.
Tillson and her family adopted Scarlet the pup as a 9-week-old to fill the hole in their heart left by the death of their previous dog, Buck.
"Bought toys for her, took the old dog's bed right over-- she fit right in," Tillson said.
But last Friday, the cute mutt they picked up at a New York shelter fell ill...