There are a lot of things you can do before your mares foal and one of them is to establish their vital signs, get a stethoscope, they can be purchased for about $13.00 for a cheep one, learn to rate their heartbeats, you put the stethoscope between their front legs, count the heartbeats, do this for a week and you will know their normal rate. Get a large animal thermometer and establish their regular temperature the same way, but in their rectum, if ou are scared to do it leave this alone. Their temp will drop a degree or two bewfore foaling. Make sure their teeth have been attended to and feet trimmed a few weeks before foaling as this can stress a mare too much later on. Make sure the mares have gotten all their shots as well. Signs of foaling include but are not limited to have a full bag and wax on the teat ends. You will be able to see a foal center when the bulge shifts from one side to being in the middle. A mare close to foaling may get restless, drip milk, rub her head or her butt on anything around, paw the ground, lay down and get up frequently, roll, nip at her sides, look at her sides, shift her weight repetedly. In fact any behavior changes may indicate the impending birth. You should watch her for at least a half hour a couple of times a day to know her routine. If she rests somewhere other than a usuall spot or changes in her behavior. A mare may not bag up just before delivery or bag up weeks in advance, she may drip milk or have milk streaming or have none of those signs. She may go off her feed or eat like normal. She may sweat especially around her ears, behind her elbows and her chest. Some mares show no sigs at all that the are going to foal and even then they may keep you on your toes watching them for several weeks. Most mares that have foaled before foal in much the same way as they did the first time. If a mare has a white bag hanging out of her rear and no progress in an hour CALL THE VET THIS IS AN EMERGENCY. A mare will foal within an hour from the breaking of the water. The difference in the breaking of the ware and a mare urinating is that a mare squats to urinate so know what she looks like then and keep a watch on her. If her water breaks she should not be left alone. If she shows any signs I have listed you should check her every hour day and night until she foals. By the time a mare delivers the owners are practicall dead from exhaustion. Hope this helps best bet is purchase the book foaling manual it is a great resource for the mare and the ensuing foal. I read it all the time and I have been breeding horses for over 20 years.