This condition can be baffling. Some cases spontaneously appear and resolve just as quickly. But, with other dogs, there can be chronic, ongoing problems of severe hair loss and balding areas.
It is thought that some
forms of Alopecia are related to an imbalance of hormones. For this reason, sometimes having a dog spayed or neutered can help.
In cases like this, if an owner is committed to restoring the coat, it can be accomplished in many instances . Do note that each coat will react differently, some with minimal restoration and some with a full and complete coat regrowth.
Also, it is important that your vet first rules out treatable health issues before you assume that it is an unknown cause; because, if your Beagle does have a medical condition, this sort of restorative treatment will only be temporary.