When did people start dressing up their dogs?

So when did Fifi start wearing a dress and Fido get his sports jersey?

What decade did the fad of putting clothes on your dog start? I’m not talking jackets/coats that keep the animal warm, I’m talking frivolous stuff like some of the stuff on this site.
http://www.poshpuppyboutique.com/Dog_Apparel_s/4.htm

It all started in 1959.

That sounds like something from the 1850s not the 1950s!:eek: