Global Dog Food Subscription Boxes Market Size, Share & Demand Report By Product Type (Dry Dog Food Subscription Boxes, Wet Dog Food Subscription Boxes, Fresh/Refrigerated Dog Food Subscription Boxes, Freeze-Dried & Dehydrated Dog Food Subscription Boxes, Mixed Meal Kits), By Ingredient Profile (Grain-Free, Grain-Inclusive, Organic & Natural, Functional/Therapeutic Diets, High-Protein/Specialty Diets), By Subscription Model (Fixed Plans, Customized Plans, Flexible Subscriptions, Tier-Based Subscriptions), By Distribution Channel (Direct-to-Consumer, Third-Party E-commerce, Pet Specialty Retailers, Veterinary Clinics), By Region & Segment Forecasts, 2026–2031