Foster care needed for Kerr

Beautiful Kerr was rescued 2 weeks ago from the beach where he'd been living for over 6 months, defying all rescue attempts until then. He is a very sweet and loving. He has advanced heartworm and needs to begin his treatment very soon. But we need a foster home for him for a few weeks during the treatment. He is 52 pounds now but he is very underweight and needs to gain 10+ pounds.

Sandra's description of Kerr: He's a very nice dog. He used to follow me everywhere. He seemed to be very happy and full of energy before getting sick. And he was very protective of his puppies (Kiyoshi and Kei) - he followed me a whole week barking at me after I took the puppies, like he was asking for them) and protective of his pack (I don't know I that will change once he's neutered). He was always the first one to greet me and would let me hug him and all but he was abandoned with a very long chain hanging from his neck and obviously he has some issues because of that. He doesn't like when he feels he's going to be picked up either.