history: My dog is 16 years old. He is starting to have health problems. Our dog is getting older and having issues. I am so sorry to hear that. I know what that is like unfortunately. Thanks. It is hard when they are a part of your family.
current: Yes definitely. My thoughts are with you, I hope he still has many years left.
next: Thanks again.  He is 16 and has lived a long life, so hopefully it won't be as hard as it feels.