Why can't I look at my pet that had a desses that sevived after I had a pet that had the same desses that died

I'm sorry to hear about your situation, but it's unclear what you mean by "desses" or "sevived". If you are referring to a disease that your previous pet had, and your current pet also has the same disease but is still alive, it is important to consult a veterinarian for a proper diagnosis and treatment plan. Only a trained professional can provide accurate information and guidance regarding your pet's health.