fraid im not much help lol we just use whatever works, our 2 largest crates we got second hand, the wire one someone was selling in the paper, and the green one someone was selling that we found out through the club, the green one was used for dog at feild trials, I think was was a dalmation, why a dalmation was a feild trials is beyond me lol the wire one belongs to a doberman before. our small, white one my dad got perky for christmas one year, Ripley crate is a pet taxi, and our last rate is a blitze, its bad for stacking but you can get it with wheels and a handle which makes it easy to take into buildings and such, you dont even have to remove the dog! lol you can also walk your dog and place all your supplys inside the kennel so you only make one trip lol