's meat problems could be over -- a San Diego butcher shop is vowing to provide free, CLEAN meat to the middleweight champ for the rest of his training camp.
Alvarez recently tested positive for traces of Clenbuterol -- a banned performance-enhancing drug -- and he blamed the whole thing on tainted Mexican beef.
Canelo says he immediately moved his training camp from Mexico to the U.S. -- and he's already got a butcher shop near his training base in S.D. down to hook him up with roid-free beef.
"This really seems like a case where contaminated, factory farmed meats almost cost someone a monumental event in their life," Heart & Trotter owner, Trey Nichols, tells TMZ Sports.