Aggressive Rescue Dog
I rescued a 13 week old puppy 3 weeks ago from a local animal shelter. When I found her she was very calm and took well to my 2 1/2 year old son. She is an incredibly intelligent dog. In the 3 weeks I've had her, she has only had 1 accident in the house, has been very easily crate trained, walks well on a leash, and knows the commands 'sit', 'lay', and 'come'.
As it turns out, very soon after I got her, she became sick. Runny nose, sneezing, coughing, etc. She became very lethargic so I took her to the vet. They diagnosed her with an upper respiratory infection and put her on antibiotics.
Now that she is feeling better, she has become very active, playful, and extremely aggressive toward us, toys, and other dogs. She growls, bites, barks, and tries to pin down other dogs and will not back down until I intervene even when the other dogs give her warning growls or even snap at her. She bites my son's heels, feet, toes, face, hands, arms, and anything she can get a hold of any time he gets down off the couch. And she is becoming increasingly aggressive during play time. I have completely stopped playing tug of war with her and only play fetch. I have been taking her on walks 3x a day to get some of her energy out. She is now to the point where she growls and bites me and does not respond to 'no'. I have gone as far as to put her in a submissive position, but it takes her a very long time to submit. She continues to growl and try to bite even in the submissive position.
HELP! I'm not sure what to do at this point. Any advice would be greatly appreciated. I'm willing to work with her but I'm not willing to let my son get hurt and I'm not sure what to do about the other dogs either.