Is anyone going to talk about Jetty?

I am really confused about the old dog, Jetty. Is Jetty an old Male dog, or female dog? They've got him in a daisy dress with flowers and all, but he's still got a 'stache and the younger dog even refers to him as "gramps".

I get that some dogs get accessorized cutely, but couldn't he just have looked like an old man wearing really colourful old man clothes? All the other animals were drawn with clothes fittinf their own gender, this just makes me feel Like the cafe staff misgendered Jetty...