Whatbis this made of, plastic, pressed board?

It’s plastic. Also very durable. I have an 80 lb American bulldog. He likes to lift the flaps, grab a hold of the flaps, and “throw” the game to the side. He learned most treats fall out that way. Lazy cheater. Regardless, the game is still fully in tact, and flaps easily pop back on. Some of the white bone middle covers have been chewed on, and still fit perfectly for intended use.

I have an “extremely aggressive chewer”. Will this hold up?

This is meant as an interactive game that you play with your dog/puppy. It helps their brain to grow and presents them with various different challenges, depending on which game you get. They are not meant to be left alone, unsupervised, with these puzzles. They are not meant to be chew toys. I have every one of these games, and they have lasted YEARS. They will not last if left unsupervised with aggressive chewers or puppies. With creativity, you can continue to make these more challenging by wrapping them in blankets putting them up on a stepstool, setting them in a box, just for a few examples. Get creative, shake things up, and your dog will have years and years of interactive fun with you.

Is this toy dishwasher safe?

Hello and thank you for your question! This product is not dishwasher safe. We recommend washing it with warm soapy running water and rinsing thoroughly. If you have any additional questions please let us know! Thank you, Outward Hound Team

Will my 9lb Yorkie be able to manuever this puzzle (size-wise)?

Yes. My 5lb chihuahua loves this puzzle. The pieces are lightweight to open and slide. Her biggest challenge is the white center caps, but only mentally challenging. She has to nudge it up with her nose then pulls it out with her paw. It does take a little while for her to get them so I only use 2 of the white caps. If I want to keep her occupied longer I can use all 4.