Right now, Sam didn't care how freaking ugly and unnatural Dean's new pet was. He was too focused on giving the creature as much raw hamburger as its massive stomach could hold. So far it had turned out to be ten pounds and counting. Dean was getting put out by the mess the animal was making of the back seat, but he had stopped complaining after he'd promised his brother that after his interview was over tomorrow, he would personally clean the entire car until it was completely spotless.
Fortunately, the fact that the car was moving wile the dog was eating didn't make the creature ill, and it appeared that dog puke wouldn't be one of the things he would be forced to clean out of his brother's car tomorrow afternoon. He didn't want to even stop and consider the others, since one of the words that could be used to describe Dean was "Promiscuous".
In that moment when Dean's dog somehow started tearing into that Woman in White who had been in the process of trying to kill him, it had been one of the most beautiful things he'd ever seen. One moment, the ghost had been trying to tear his heart out, and the next, it was wounded and fleeing towards the house where the ghosts of its children had dragged it to Hell.
No matter what dad said about Dean's dog, he would help keep the creature alive even if he had to keep it himself just to keep dad from trying to kill it when Dean finally found him.
Based on now much the ugly mutt who could easily put what he'd previously thought was the ugliest dog in the world to shame could put away, it would be a very expensive prospect, one that might nearly cripple his already tight budget.
Still, the animal did save his life so he could go home to Jess...