When sourcing cow rubber mats, prioritize material composition and durability. Look for mats made from high-quality NR (Natural Rubber) or SBR (Styrene-Butadiene Rubber) rather than low-grade reclaimed rubber, as the latter can emit toxic odors and degrade quickly. Ensure the thickness is at least 17mm to 25mm for adequate cushioning. The tensile strength should exceed 4MPa, and the hardness should be between 60-70 Shore A to balance comfort with wear resistance. Additionally, verify the anti-slip surface pattern (e.g., hammer, pebble, or diamond) to ensure animal safety in wet conditions.