Rex is an approximately 80 lb Mastiff mix with a giant head, a big personality, and an even bigger heart. Rex had spent his life living outdoors in a fenced pen alongside his mother, Cocoa, with very little exposure to the world and no formal training. Since coming into foster care, Rex has made wonderful progress and is showing everyone what a sweet, affectionate dog he really is. He is still learning about the world and appropriate manners, but he has proven himself to be a loving, cuddly companion who enjoys being close to his people. Rex is a big, gentle brute with a soft heart. Despite his size and strength, he can still behave like an oversized puppy who is learning about boundaries and how to navigate the world appropriately. He is an absolute suck who loves attention, cuddles, belly rubs, and being close to his people. He even sleeps in bed, spending much of the night up by his foster's pillow with his giant head right beside them. Rex can become very excited when his people…