So is Chewy only aggressive to Teddy over objects--like food, toys, etc.? Nebo is food aggressive with DOGS, not people. He also does not like them going near his toys, but he's not quite as bad as he is with food. He has bit at Smokey a few times for going near his food. He even kind of grabbed his ear/head once (he spent the rest of the night howling in his crate over that one) My best answer was just to not let them be around eachother when eating. If I can see Smokey or Reggie getting to close to Nebo when eating/chewing on a toy, I get them away. My dogs still do not get along well (although Nebo is much better with them, Reggie still always growls at him for everything) but our house still remains pretty peaceful. I never let them outside alone together, as Nebo tends to start running at full speed and chasing them, and I always supervise them if they are in the same room (of course Nebo is supervised all the time anyway as he is still a pup and gets into everything).

As far as the muzzle....I agree that it is for you to decide. But, we use muzzles on dogs at work all the time (grooming) and the kind we use are pretty nice. They are black, soft, and fit all around the muzzle except for an opening in the front. They snap in the back and stay on very well. I believe they are about $10 at Petco, although I've seen them cheaper in a catalog. This type of muzzle does not allow the dog to bark, or eat/drink. But if the dog can eat, the dog can also bite.

I really think Chewy might be developing some "issues" that need to be resolved soon...he's still very young. I think it would be good to maybe see a trainer, or at least get him into a basic obedience classs. Just having Nebo in the puppy kindergarten class helped him out quite a bit. I plan on getting him into the basic and advanced classes also. A well-trained dog is much better at becoming a respected family member.