Definition of "pittie"

I was used to slammed doors, rumbling buses, shouting, snarling pitties, police sirens, […]

2012, Marta Acosta, Dark Companion, page 33

Maybe he'd want a signal from me that he should rush to the carrier and retrieve a pittie on his own— a small one, alive, our new class pet.

2014, Ellen Cooney, The Mountaintop School for Dogs and Other Second Chances, page 247

Lori and I rescued a pittie from a local rescue organization and our lives have never been the same.

2015 August, Sara Ernest, “Love in Rescue”, in Quorum, page 6