My sweet basset boy Jake... now almost 4 years old... has suddenly started violently attacking our little Indiana- a pound puppy we have had for more than 2 years. It started two days ago anad we aren't sure what set it off... We thin Jake may be feeling protective of one of the other dogs and is just trying to put Indy in his place... but it is very scary. Yesterday I was too far from water so I threw the laundry basket at them. Jake has nipped Indy's ear hard enough to make it bleed... but didn't tear it thank goodness! Any thoughts, suggestions? What can I do to intervene and hopefully nip this behavior in the bud?