Congestive Heart Failure Common in Older Shih Tzu

Congestive heart failure is a serious condition that does affect older small breeds such as our beloved Shih Tzu. Congestive heart failure is defined as the heart's inability to function normally, which leads to excessive retention of water and salt causing fluid build-up in the lungs. The major underlying cause is degeneration of the heart valves. Small Dogs and the Shih Tzu with this condition often develop a heart murmur, however, it is important to know and remember that not all dogs who have heart murmurs will develop congestive heart failure.