It's obviously all for attention, regardless of whether or not there's a grain of truth to it at all.
The entire dog-loving thing is just the latest ploy for attention, just following on from his lies last summer about being a girl and leading on flatflyer.
You can tell it's for attention just in the way he acted coy about it to begin with, giving suggestions that he'd wanked over a dog. He was testing the waters to see what response he got, and it was a big one. So now he's more than happy to admit to loving dogs, justifying it, telling us about him watching zoophile research and even making topics inviting further jokes (if everyone thought you forgeted dogs would you actually make a topic about your dog giving birth whether it was true or not?).
Whether or not others will mention it when not necessary is besides the point when Pie has made it his mission to be the perverse centre of attention.
If this entire thing blew over by New Years and it was just a minor in-joke like tuna jars and purses, then I guarantee that Pie Crust will have a new controversy around him in 2016, if he's even still here then.