Tammy Slaton‘s health took a turn for the worse during a teaser for the upcoming fourth season of the hit TLC series, 1000-lb. Sisters, obtained by PEOPLE. The trailer started off with Tammy, 36, announcing that she plans to go to rehab. The next clip showed an ambulance sitting outside a hospital with the lights on and sirens blaring. “Tammy quit breathing”, the voice of a worried family member said before her sister, Amy Slaton, added, “Her body shut down.” Next, the trailer showed Tammy in a chipper mood after receiving a tracheotomy to help her with her breathing. “I’m...