We only have two dogs and peeing on the carpet wasn't what turned it yellow. It was the "pre treat" solution they used before they started the carpet cleaning. Also, the check he promised after repeated calls to him asking for it, did finally show up. I took it to his bank and presented it for payment. I was turned away as the account did not have sufficient funds to cover the check for $150.00 (which was only a portion of the $414.00 I was charged for the original tile and carpet cleaning.)