I used this once, as recommended by my trainer. I prefer the Nina Ottosson toy I bought, so I'm selling this one since my pet wasn't interested. Although there's a cat picture, it can be used for dogs too. ★ Recommended by trainers, this is a level 2 difficulty puzzle toy. ★ Get treats and become a clever dog/cat! * Material: Polypropylene, synthetic rubber * Country of Origin: China * Size: W25.7 x D23.3 x H6.5cm * Weight: 572g Dog toy, cat toy, wooden, dog puzzle toy, educational toy, dog nose work, treat-seeking training, dog training, dog discipline, stress relief, exercise, prevents fast eating, indoor play, dog supplies, cat supplies