Answer: Dean knows nothing about dogs. He simply spent a whole bunch of money to buy a top team and a fancy sled.
Explanation:
Your question isn't complete. The complete question has been added in the comments.
The detail that supports the prediction that Dean won't properly take care of the dogs is that Dean knows nothing about dogs but simply spent a whole bunch of money to buy a top team and a fancy sled.
Since Dean doesn't know anything about dogs, then this can lead to a difficulty on how he'll take care of the dogs. Since he doesn't know anything about dogs, he may not know the kind of.food to give them and how to keep them healthy.