Dean Foods, the food manufacturer whose brands include Land O’Lakes, Horizon Organic Milk and Friendly’s, missed second quarter earnings estimates Tuesday as retail sales fell and anticipated the “macro and competitive” pressures it faced will continue in the coming months.

Earnings for the quarter tumbled 45% to $18 million.

Per-share earnings, after adjusting for some items, were 21 cents, lower than the 31 cents estimated by analysts who were polled by S&P Global Market Intelligence.

Shares of Dean Foods sank 13% in pre-market trading Tuesday as the company also lowered its 2017 per-share earnings expectation to a range of 80 cents to 95…