Hello Lisa, I have experienced the same problem with a pair of Nike Air Max 95's, and a pair of Nike Shox Elite. THey reek so bad that I did an internet search on the problem, which led me here. I have other, older trainers I wear on a much more frequent basis that don't smell at all, yet the nikes reek of Tomcats.So much so, that when I visit someones house I don't want to take them off as they stink out the house, so basicaly I gave up wearing them, which is annoying after spending 90 odd quid on them. You'd thing with Nikes billions, they'd be able to sort the problem. Apparently if you put sodium bi carbonate in them that will help, but I haven't got round to getting some yet. Please yet me know if you have discovered something that combats the smell of cats piss.
Tom Evans (UK)