Our expert says:
Phew - a long story! As I am not a vet I suggest you re-post the drug side of the question again so the vet can answer it. I don't know what Nuzak is, but I guess it may be a type of Prozak? There is another drug which is newly in SA called Clomicalm (or Anafranil) and may be an alternative, but I don't know much about it yet. There are also homeopathic/naturopathic alternatives, but ask the vet about those too. Usually I suggest a "drug induced holiday" for stressed out dogs in which time (1 - 4 months) the owners follow a behavioral program to change the behaviour. Then the dog is gradually weaned off the drug, if possible. Behavioral treatment of stress involves understanding and using calming dog body language - this includes stretching, yawning, sitting, lying, turning away from stressful things and "smelling the roses". Most households are quite chaotic and stressful and if people would just relax more (or pretend to) the dogs would also relax. Being the leader is also important, but positive reinforcement is the way to do it (e.g. Clicker training, as you mentioned) - lots of encouragement for correct behaviour and no reprimanding or punishment, except perhaps very passive ignoring of unacceptable behaviour by walking away. Being the leader means you are in control of resources like food, toys and space, which you can use to manipulate your dog. She should be watching you, not you watching her all the time. In fact you should try ignoring her more and only giving attention on your terms, about every second time she comes to you. Touch is another important way to relieve stress so try to massage or brush her regularly, especially on her hindquarters and muzzle as these are two places where aggressive and insecure dogs hold tension. TTouch is also a wonderful method to learn (see links on my site www.animal-behaviour.org.za/karengray). Having said all this, sometimes it's just never going to work and she may need a home where she is the only dog with no competition for attention. If your smaller dog is at risk of being killed I would seriously consider separating them permanently.
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