Is the soil extra alkaline in the area? Could be alkaline burns.
Do you rinse the disinfecting solution from the floors after washing? Could be a reaction to the cleaning stuff.
If it really is bacterial, I've heard that you can use bleach to kill the bacteria in the soil, but I'm not sure of the mixing ratios. Sorry. Has the vet done cultures to confirm a bacterial source? It actually sounds like a chemical reaction to me.
Do you rinse the disinfecting solution from the floors after washing? Could be a reaction to the cleaning stuff.
If it really is bacterial, I've heard that you can use bleach to kill the bacteria in the soil, but I'm not sure of the mixing ratios. Sorry. Has the vet done cultures to confirm a bacterial source? It actually sounds like a chemical reaction to me.