Sentence 1: Bryan was trying to do his homework, but his dogs were barking. 
 Sentence 3: Bryan was forced to go out and buy food 
 Sentence 4:  Bryan bought food in bulk for his dogs 
 Sentence 5:  The dogs were happy and let Brian do his work 
 Option 1: Bryan found another bag of dog food in the shed. 
 Option 2: His dogs were hungry and they had no food.