My neighbor is out of town. I walked his dog for him last weekend, but this week his roommate took over. Problem is, the roommate only takes him out twice a day for about 10 minutes. The dog has been out on the deck crying and howling every day. Jake is a mix- part pit bull, but not very big- I'd say he's about 50 pounds, but very muscular. He's very high energy, but has been very sweet when I've walked him before. Today I just couldn't stand the howling anymore so I took my dog, Zoe, on leash to his place and got Jake (also on leash). As soon as we got outside, Jake was just uncontrollable with energy- jumping, barking, going berzerk. As I tried to calm him down his leash got tangled up with Zoe's and suddenly he attacked her! They snarled and growled and it was very frightening. I let go of Zoe's leash and she got free. Jake didn't hurt her, but his aggression scared me to death. I've never seen that in him before and wonder if his lack of exercise this week has made him frustrated and aggressive. Thoughts?