Chewy CEO Sumit Singh reviewed the online pet supplies retailer's most recent quarter in a Wednesday interview with CNBC's Jim Cramer, and detailed strategy — namely a focus on scale, convenience and personalization."Pets...is a super emotive category," Singh said. "And in an emotive category like this, when you show up with being best in class in what we do — which is e-commerce — but then we deliver service levels that you can only expect at the best local neighborhood pet stores, it kind of is the best o ...