Diane Shiffer on Instagram: "I get so many questions about the DIY winter shelters we made for the neighborhood feral cats, so I’m resharing our process video from a few years back. In anticipating some of your further questions: the styrofoam coolers are to-be-discarded medical supply packaging and were free from our vet. The warming pads are specifically made for animal use. They are coded for outside use, and only remain on when activated by the pressure of an animal’s body. Make sure you use