Aside from the obviously unsafe wheels, several of those cages are also not baby safe. The openings are too wide, a kit could easily escape through them and be lost.
The ones on the left are not bad, and the Demar type in the middle are okay, but all the ones on the right 2 columns are not safe for kits. Anything with more than a 1/2 x 1 inch opening is not kit safe.
The ones on the left are not bad, and the Demar type in the middle are okay, but all the ones on the right 2 columns are not safe for kits. Anything with more than a 1/2 x 1 inch opening is not kit safe.