Dealing with a Dominant Dog
The dog owner must stand up and take the "pack leadership" at home. Otherwise, the pet dog might try to sneak in and try to establish itself as the leader if there appears to be no dominant and constant alpha male to "lead the pack", so to speak. When you permit your dog to dominate and lead the pack, it could become audaciously confident. In this position, the dog will eventually not listen to your commands and it might do whatever it wishes. Dogs that tend to dominate and exhibit this behavior are often male dogs, but there are times when females can take charge of the pack if no one leads or dominates. To prevent the escalation of this problem, you got to nip the issue in the bud. Start creating and establishing rules which everyone will follow with no exception whatsoever. Consistency is vital to let the dog know his place in "your pack".
A sudden change in your pet’s health and/or behavior should require a visit to your vet clinic San Antonio, TX.