Sentence 1: Kelsi really loved dogs. 
 Sentence 3: The poodle was brand new and needed to be trained 
 Sentence 4:  Kelsi then trained the dog for a few weeks 
 Sentence 5:  She never got bitten again 
 Option 1: However, one day her poodle died suddenly. 
 Option 2: However one day she was bitten by her poodle.