It’s Friday, and that means I have another case for you today. Today is a tough one. Tough in the sense that it was completely preventable. But, it is a good reminder that our actions and decisions not only affect us, but also other people, and in this case, the pets around us as well. Meet Lizzy (name changed for privacy). Lizzy was a patient of mine for years. Cavalier King Charles Spaniels are wonderful little dogs. They have great personalities and make fantastic family pets. She was a sweet little firecracker and I always enjoyed seeing her. Lizzy came to see me due to a cough that she had developed. She was still eating and drinking, but was more quiet and had a new cough. Knowing what we Veterinarians know about Cavaliers, my first thought was that she may be developing heart disease. One unfortunate fact about this breed is that they are genetically predisposed to developing heart disease. Their mitral valve (valve between the ventricle and atrium on the left side of...