Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quality blocks but many have a small hole

I got the "large" size of these blocks to "refill" some of my conure's toys as she chews through her blocks. I would judge these are good size for a medium parrot like a grey, mini-macaw, or amazon--a macaw or big cockatoo could possibly chew through these pretty quickly. They work well for my conure, though, because she is a dedicated chewer, and many conure-sized toys are too "easy" for her strong beak. My only complaint is that most of the holes in the blocks are tiny. They fit a wire or small chain, but not rope or large chain. This problem was solved by "carving" the hold bigger with a knife, but be warned these blocks may need some work if you want to string them on an old toy!