I use to wash my kennels with bleach, BUT I don’t no more--- I fnd out that bleach and the ammonia in the urine react and eat up metal like it was candy ---so now--- I use a product called OdoBan it’s pretty cheap to at $9 a gallon I get it at homedepot, I think it makes something like 32 gallons, I bought a sprayer (kind one would use for bugs) spray it and leave it, I dont rinse at all, smells pretty nice too it comes in a few different sents, I find that the eucalyputs is teh best one by far.
If you read the label it has a 99% kill rate on parvovirus to add to the benefits list.
http://www.odoban.com/