Which condition is not typically treated with immunosuppressive agents?

Feline leukemia is a viral disease caused by the feline leukemia virus (FeLV), which leads to immunosuppression and various health issues in cats. The treatment for feline leukemia primarily focuses on supportive care and managing secondary infections rather than the use of immunosuppressive agents. This is different from the other conditions listed, which involve autoimmune processes where the body’s immune system attacks its own tissues, making immunosuppressive therapy a typical option to help control these inappropriate immune responses.

In contrast, rheumatoid arthritis, lymphocytic-plasmocytic enteritis, and lupus erythematosus are autoimmune conditions characterized by an overactive immune response that leads to tissue damage. In such cases, immunosuppressive agents are commonly employed to help reduce the immune system's activity, minimize inflammation, and prevent further tissue destruction. Thus, feline leukemia stands out as the condition not typically treated with immunosuppressive agents due to its viral nature and different treatment focus.