There are strays living near me. All have been spayed or neutered, but one. I am trying to get a shelter together for them. I got one of those plastic storage tubs with the plastic cover and cut a hole in the front for an entrance. I put blankets inside. I can't find a styrofoam cooler big enough to fit in the tub. I am in the southeast and wonder if the tub and blankets are enough? If not, where are you finding the big coolers? On another note, how many cats are you all figuring in for fitting in these tubs? I am new to this and wondered if a few could huddle together inside one. These cats have been out in earlier winters without help, so I have been told. I don't know how they made it unless it is because extreme temperatures for here are not as low as other areas.