My cat has a chest lump but is eating normally. What could it be?

Thank you for submitting your question regarding Pillu. I recommend that he sees his veterinarian for an examination and a procedure known as a fine needle aspirate. The veterinarian will use a small needle to collect a sample of cells to evaluate under the microscope. This will help to diagnose the mass. He could have an infection under the skin, a benign growth or even skin cancer. Based on these results, treatment can be started if needed. I hope this information helps!