MEDWAY - Medway’s Loyal Companion Pet Store is going out of business. The chain has 17 locations in Massachusetts and more than 50 total across the US. But on Monday the company announced they would all be closing up by the end of this month as part of a Chapter 11 Bankruptcy Filing. They will be maintaining some stores under a different brand name in a few western and midwestern states but must leave Medway. They say they will try to find other pet stores to take over the spaces they are leaving.