heart failure

I've read a lot of articles about how to know whether it's time to put a dog to sleep, but I'm still torn about what to do in our particular situation. My pup is 11 years old (a long-haired dachshund mix) who I've had for 8 years. In the past couple of years, he's developed worsening arthritis...

I have a 10.5 year old chihuahua. He had been diagnosed a couple years earlier with a collapsing trachea (common in chihuahuas) and a very mild heart murmur and was on hycodan for the cough but nothing for the heart as it was mild. On Dec 22nd, 2013, my chihuahua started to breathe very...