According to @business, Pets at Home shares tumbled the most on record after the company lowered its profit forecast for the second time in less than two months, triggering a sharp selloff in the stock (source: Bloomberg/@business). For traders, the back-to-back guidance cuts and record single-day decline underscore elevated earnings risk and sentiment pressure in the name, which is central to near-term price discovery and risk management in UK retail equities (source: Bloomberg/@business).