Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to take care of a horse in hot weather [title] Clean all water sources daily. [step] Algae and bacteria flourish in warm, moist spaces, particularly streams, ponds, and watering troughs. Wash out water buckets, water tanks or fountains so the water your horse drinks will remain uncontaminated.

Ending1: [substeps] Clean this source of water in the spring, before summer starts, to prevent fungal mildew and bacteria from growing in the water. [title] Change your bedding at all times. Ending2: [substeps] Remove traces of bacteria, pesticides, and other commercial chemicals by putting clean water and a soft cloth in a bucket. Try using bottled or filtered water to keep from contaminating your horses grain. Ending3: Provide cool drinking water to ensure proper digestion; water that is too cold will interfere with digestion. [title] Feed your horse foods high in water content. Ending4: Additionally, take out any irrigation tanks, upright water heaters, or removable hose systems so your horse has fresh water available for himself or her all day. [title] Avoid putting your horse on wet terrain.

Answer format: ending1/ending2/ending3/ending4