Sentence 1: I fed my dog some pork. 
 Sentence 3: My dog threw up the food 
 Sentence 4:  Luckily, his sickness ended after one day 
 Sentence 5:  However, I realized that I needed to be careful about feeding my dog 
 Option 1: He liked the pork dog food a lot. 
 Option 2: Alas, the pork did not agree with his stomach.