What he requires immediately is your company to replace Hero, keeping him occupied, may help to overcome this problem. Physical activity like walking or exercise will also help him become more relaxed and comfortable in his surroundings. Identify situations and environments that Jimmy will need to be comfortable with and help him gradually to live without his lost friend. Acquiring another companion puppy/dog is not a bad idea if it is suitable to your home. Jimmy will require visit to the vet if he continues to refuse food and lose body weight.
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