Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to give a cat an enema at home [title] Watch for signs of constipation. [step] If your cat is constipated, you may notice her repeatedly enter the litter box, squat to defecate, but fail to pass any feces. Your cat may strain and vocalize (meow, cry, yowl) during these attempts.

Ending1: Other symptoms can include low energy, loss of appetite, throwing-up foam or undigested food, and abdominal pain. Sometimes, you can even feel a large hard lump of feces if you gently push on your cat's abdomen. Ending2: Once your cat stops vocalizing, it could be for some reason a complication. [title] Place your cat on your thigh with one hand on her stomach. Ending3: She may also develop problems in the bowel after using the litter box. [substeps] Pregnant or breastfeeding cats may also constipate and vocalize. Ending4: [substeps] If you notice your cat advocating for a constipation diagnosis and seems to have trouble passing stools through the anus, ask her to stop. If stool leaks from the vulva, your cat may be constipated.

Answer format: ending1/ending2/ending3/ending4