My youngest chihuahua was put to sleep last night and I am so sad. He had a heart murmur and had been on medication for 5 months for heart failure. He struggled all day, his breathing rate was so high, it was the kindest thing to do. I'm just so sad. Stanley was 10 and was such a little character, he's the short haired boy in the front of the picture. My other dog is going to miss him so much.