Not to scare you, but I my Cocker Spaniel that I had for over 11 years (we did not get her when she was a puppy, she was a rescue, so I am really not sure of her exact age, but she was older...probably around 13-15 years of age) passed away this January and we found out that she had an enlarged heart when my vet did a Chest X-ray on her. She started having little Heart Attacks (which happened about a day or so AFTER the vet put her on antibiotics for a Cancerous Tumor that she had on her stomach, of course we had this surgically removed, this was done on the day she passed away, her passing happened not long after the surgery of her tumor removal due to her having another heart attack) and right after that is when the Heart Attacks started. The vet, nor I, had no idea that she had enlarged heart before she was put on the medication for the tumor, so I have no idea if her having an enlarged heart and being put on the meds made everything worse, but thats when the heart attacks started and a few days later my sweet baby passed away. Please, please, please have the ultrasound done. It is better to be safe than sorry
