My Dog Cant Bark. Vocal stress or health issues if you have a dog that has suddenly stopped barking or appears to be trying to bark without making any Anything that affects the larynx (voice box) can make it.

If they suddenly became quiet, they might be suffering from stress or anxiety. If your dog suddenly can’t bark when he or she comes home from a kennel, then there’s a strong possible that they could have contracted some form of kennel cough while they were boarded. Always check with your veterinarian before changing your pet’s diet, medication, or physical activity routines.