I've always used dog shampoo, and have never read anywhere about cat shampoo - only to use a gentle shampoo due to the potential for sensitive skin. Your post intrigued me, so I did an Internet search and found nothing about cat shampoo.
Perhaps shampoos are different here? They all need to be non-toxic, so would be safe for licking regardless.
Well, it is confusing….we humanized dogs to the point of exhaustion, esp.if you have basenji's, which I believe are one of the most primative dogs on earth, at least, trainning, feeding wise. They would rather be cruled up in the sun, killing whatever they want, birds, cats in my case, and of course play......play, run.
K.I.S.S. keep it simple stupid....but this is a billion dollar industry.......
Barooo's to all, and good luck