Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to cure colic in horses and ponies [title] Know the symptoms of colic. [step] The symptoms of colic can vary based on how severe the colic is. Though the pain is in the stomach, your horse may show signs that don't automatically point to the stomach.

Ending1: The highest stage of colic is indicated by feeling nauseous, vomiting or diarrhea, and chills. [substeps] For instance, your horse will vomit blood every morning, or if you see her frequently defecating, have a very strong feeling that she may be pregnant. Ending2: [substeps] Marked or unusually distended belly. This is the first sign of colic. Ending3: If this is the case, it is important to contact a horse practitioner. [substeps] This pain affects both the stomach and digestive system, and is accompanied by a feeling of nausea. Ending4: [substeps] Mild colic may exhibit in your horse as restlessness, such as pawing at the ground. Your horse also may keep curling his lips or keep looking around to his backside.

Answer format: ending1/ending2/ending3/ending4