Partitions for Cages . . . CCCHICKENS~ When my kids or I have needed cardboard in a certain weight or size (typically for art/school/PTA projects), we've gone to a grocery or Target type of store and looked at cardboard product displays. When the perfect example was found, we'd ask the store manager if they had some stacked up for recycling or if they could save a particular display to be pick up later in the week, etc. When you start scoping out all of the displays, you'll be amazed at all of the sizes and weights of cardboard. If you're lucky, you'll find exactly what you need, or you can always cut it to size with a mat knife. I've read that you can sterilize the cardboard by putting it in the oven on the lowest setting --around 175c--for 10 mins. or use a steamer or lay it in the direct sun. If you want to reuse the partition, you could cover the cardboard with cellophane package tape, adhesive vinyl contact paper, or have it professionally laminated. Then it could be cleaned with a white vinegar and water solution or another type of disinfectant.
Here are a few types of common displays, but you can find many other shapes and sizes.
Here are a few types of common displays, but you can find many other shapes and sizes.