Help,my 2 male Jacks are normally best friends but over theast few days they have had 2 big fights,at the moment I am keeping them apart,both are 10 years old,one been here all his life,one since last June.
yeah I'd agree with mikroc. Your younger dog is trying for top dog position, and the older one isn't willing to back down. Is it around food or toys ? Getting the younger (or both) ball chopped off may help.