Strange chicken event

One of our chickens had a funny turn this morning. She seemed to lose her balance spread her wings presumably to keep upright and squatted with the right foot folded back under her belly. Went very quiet/subdued for about  an hour. I put her into a large box to separate her from our 2nd chicken. Put some water and a little food treat.She then munched the treat and within ten minutes perked up. I wondered if she might have had a small stroke. Can chickens have strokes?