Minimum height of a quail enclosure?

[QuailMan6666]

I recently acquired a rabbit cage that has a coated wire flooring. The cage is about 20 inches tall. If my Coturnix quails get startled and jump upwards, will they break their necks? Would adding foam cushion on the ceiling help? Or is this height okay?

 

[QuailMan6666]

Quail can jump at least two feet into the air. 20 inches isn't high enough to prevent head bumps. If you wanna do quail, safest bet is to get a cage where they cannot jump, or one that is at least 4 ft or taller to be on the safe side.

I have a dremel with a cut off blade for metal, and I think I can make the cage shorter in height. How low should I lower the cage ceiling to?

 

[GrammasGarden]

I have a cage 12inches tall, with Coturnix (supposedly jumbo" if I insert a layer to make it 2 stories each 6 inch tall, is that too short?