乳業株が集団急騰、複数銘柄がストップ高　原乳業界に転換点到来

Same as above; rising milk prices and reduced cow inventory improve outlook.

Article states raw milk sector reaching turning point with rising milk prices and declining adult cow inventory, benefiting dairy companies that control milk sources.

Same as above; improved supply-demand balance and stronger bargaining power for dairy firms.

Same as above; turning point in raw milk cycle benefits dairy companies.