Why is my dog jealous all the time?

The Jack Russell is a fearless, happy, alert, confident, intelligent and lively hunting dog. These qualities make him a sturdy, vigorous companion, ready to meet the world on a moment's notice, and, unless he is appropriately trained and exercised, can be subverted into wanton destructiveness. The Jack Russell Terrier Club of America describes the character thus: "The unique personality of this feisty little terrier is capturing the hearts of many, but they are not a dog for everyone. While adaptable to a variety of environments, they are first and foremost bred to be hunting dogs."

As appealing as he can be_ and that is very appealing_ the Jack Russell is not the ideal pet for everyone. He has his share of terrier aggression towards other dogs and is deadly towards animals it considers to be prey. Thus cats, hamsters, gerbils, and other household pets can be in jeopardy if the dog is not supervised or confined. Furthermore, this militant streak makes it difficult to keep a Jack Russell in a home with other dogs, even others of its breed. Like most terriers, the Jack Russell is a digger and a barker; if not given enough opportunity to indulge these inclinations outside, he may dig holes in the furniture and bark at everything that moves.

However, in spite of caveats about its sometimes irascible temperament towards fellow canines and small animals, the Jack Russell can be a terrific family pet. He has a gentle and kindly nature with people and is usually friendly with small children -- if they are well-behaved. He will likely not put up with poking, prodding, or abusive rough-housing from boisterous or ill-behaved youngsters, but he is amenable to learning tricks and games.

Dogs are extremely gregarious animals, and like their wolf ancestors, and very much focused on the members of their immediate family group--and the pack to a lesser extent. If you found a stray sleeping on the street, it is very likely that she has been emotionally traumatized by the event. It may take literally years for her to be comfortable with the thought that you would leave her presence, but not abandon her. I don't know you or the dog, but i strongly suspect that she is motivated by anxiety. If this is the case, it will eventually go away--mostly--but it will take a very long time, and she will never be entirely free from the separation anxiety.

Letting her get to know other people and dogs with whom it is reasonable to expect she can frequently make contact will expand the circle of her acquaintance, and help in the long process of reassuring her. If you don't intend to keep her for the rest of her life, it is imperative that you get her into a good home in which she will spend the rest of her life as soon as possible.

Quote:

The Jack Russell is a fearless, happy, alert, confident, intelligent and lively hunting dog. These qualities make him a sturdy, vigorous companion, ready to meet the world on a moment's notice, and, unless he is appropriately trained and exercised, can be subverted into wanton destructiveness. The Jack Russell Terrier Club of America describes the character thus: "The unique personality of this feisty little terrier is capturing the hearts of many, but they are not a dog for everyone. While adaptable to a variety of environments, they are first and foremost bred to be hunting dogs."

As appealing as he can be_ and that is very appealing_ the Jack Russell is not the ideal pet for everyone. He has his share of terrier aggression towards other dogs and is deadly towards animals it considers to be prey. Thus cats, hamsters, gerbils, and other household pets can be in jeopardy if the dog is not supervised or confined. Furthermore, this militant streak makes it difficult to keep a Jack Russell in a home with other dogs, even others of its breed. Like most terriers, the Jack Russell is a digger and a barker; if not given enough opportunity to indulge these inclinations outside, he may dig holes in the furniture and bark at everything that moves.

However, in spite of caveats about its sometimes irascible temperament towards fellow canines and small animals, the Jack Russell can be a terrific family pet. He has a gentle and kindly nature with people and is usually friendly with small children -- if they are well-behaved. He will likely not put up with poking, prodding, or abusive rough-housing from boisterous or ill-behaved youngsters, but he is amenable to learning tricks and games.

http://www.canismajor.com/dog/jackruss.html

Hmmm................This does not sound at all like your dog. Possible early experiences may have made the pooch insecure!