New York CNN  — 

Dollar General slashed its sales and profit outlook for the year on Thursday, blaming headwinds including weaker consumer spending on non-essential purchases and increasing theft.

Dollar General shares tumbled nearly 17% in pre-market trading Thursday.

The discount retailer now expects sales for the full year to rise between 1.3% to 3.3%, down from its previous forecast of a 3.5% to 5% increase. It expects full-year earnings to decline 22% to 34% from its previous estimate of a flat-to-8% decrease.

The retailer said its same-store sales (or sales at stores at least a year) are expected to range from a decline of about 1% to an increase of 1% for the year, compared to its previous expectation of a 1% to 2%. increase.