Hi there, I'm looking to get a Ruggable rug for my living room and wondering whether to get the 7mm tufted or the 2mm flatwoven. I'm especially interested since I have a dog that might pee on the rug, so wondering if either is better for getting stains out or if they're both the same. Also wondering about whether to get the standard pad vs the cushioned one. I'd love it to be substantial and soft but also concerned about the stains. Thanks in advance! -Zach