Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose mammary disease in intact female dogs [title] Inspect for abnormal growth. [step] One of the surest signs of mammary gland disease is the growth of abnormal masses underneath the skin. Growths like these are almost always causes of concern and are indicative of some sort of mammary disease.

Ending1: [substeps] The majority of abnormal growths on or around the mammary gland are tumors. Tumors may appear as one or may appear in clusters. Ending2: One common symptom of mammary gland disease is loss of appetite. They usually occur within one week after feeding and progress as the dog ages. Ending3: These lumps include : [substeps] Lumps (a rounded stomach) growths like this: this is caused by mammary breast cancer. It usually arises due to an overeating habit or due to poor menstrual maintenance: for many dogs, it indicates mammary cancer. Ending4: It is normal for the mammary gland to grow larger underneath the skin. The mature mammary gland will also grow outward from the mammary sac.

Answer format: ending1/ending2/ending3/ending4