If your dog suddenly falls silent, the first thing you should do is determine whether it’s because he’s not trying to speak, or if he’s making an effort to bark, but cannot. If the latter is true, chances are there is a medical problem and you should seek your veterinarian’s help. While barking too much can cause a dog to lose his voice, more serious medical conditions such as respiratory infections, metabolic disorders, tumors or growths, or lesions in the throat can also cause your dog to lose his voice.
Though silence is often a non-issue, problems can arise if your dog refuses to bark when he needs to go outside or be let back in. Fortunately, there are other ways for Fido to let you know he needs help. Many pet owners have had success hanging a wind chime or jingle bells by the door at dog height, allowing their pets to page them without using their voice. If your dog scratches at the door, hang the bells over the spot where he scratches. Take him to the door on a leash, help him ring the bells while using a verbal command, and reward him with a treat before going outside. With some practice, your dog should learn to ring you for assistance without ever needing to raise his voice.