Pet Food and Treats Market Size & Forecasts 2026-2035, By Segments (Distribution Channel, Life Stage, Pet Type, Price Range, Ingredient Type, Packaging, Special Dietary Needs, Product Type), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Mars, Nestlé, Hill's Pet Nutrition, Royal Canin, Purina)