person A: It is so difficult to have a pet pass away_comma_ I really miss him.
person B: Aw I understand that_comma_ I have gone through that myself and it's very hard. When did this happen? 
person A: Over the summer_comma_ he started acting strange so we took him in for testing.
person B: Oh no I'm very sorry. What kind of pet? 
person A: A border collie_comma_ he was a great doggie.