For sure! Keep close watch!!
A friend of mine in New York just lost a little filly this morning. She'd been up for 2-3 days with the little momma -- who was a very experienced mare -- and at 3:30 am, mom was eating her hay, and just standing resting with her hind leg stretched back. She thought mom was just resting, so she went inside to catch a little sleep. BIG mistake.
Thank goodness momma was a VERY experienced mare having had many foals and was good and stretched out. Baby was a red bag, and at 6:30 am she found mom still munching her hay, with the baby laying at the stall door with the full placenta on top of it. Too late to save, but a good lesson to learn. Never take any behavior for granted. When they're close....they can be sneaky !!
Happy foaling!