Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose and treat pyometra in cats [title] Look for a distended abdomen. [step] Cats with pyometra will often develop a distended abdomen. A distended abdomen is an indication of infection, digestive issues, and other serious complications.

Ending1: This is especially common in cats with pyometra. [substeps] The stomach is tightly secured to the back and can expand when you lay down. Ending2: Look for : [substeps] Decreased fat or muscle on the abdomen. A bloated appearance around the area of the stomach. Ending3: Dogs who have irritable bowel syndrome may also develop a distended abdomen. [substeps] Make sure your cat is upright and active before touching the area. Ending4: [title] Take your cat to the vet if symptoms worsen. [step] Signs of infection in cats are especially noticeable in kittens.

Answer format: ending1/ending2/ending3/ending4