Our beloved 10 year old yellow lab, Citra, passed away on Monday. I thought I could get past it since she wasn't MY dog. But it's just hitting me that my lab, Thunder, is 13. Citra was the "dumb" lab we all know about. She was the sweetest dog on the face of the earth, but even the trainer gave up on her. She gave us our money back because nothing on earth could get Citra to stay away from people. She would come under any circumstance, but you try to get her to stay....LOL I feel awful, because her early death could have been prevented. She got heartworms within this last year. With her age, the vet and our family decided it was best to not test her system. She wouldn't survive the injections. So, he gave us Heartgard to help treat the adult worms. It wouldn't hurt her because it would work slowly instead of fast. The day before she passed, I heard her coughing and hacking and I thought to myself "We need to get her put down...she isn't having a good life anymore." But she took it from us. Thunder, the 13 year old is starting to lose weight ridiculously and I've heard him coughing. But he and Marley, the 4 year old are on heartworm meds and have both tested negative for heartworms. I'm just scared...seems like I'm losing everything at once.