My dog is a chihuahua dauchson, a chiweenie for short. She's normally very hyper active and happy, playful. She's almost 7 years old. She's lived at my dad's for at few years, then to my brothers house for a month or two and now she's been at my mom's since october. She hasn't ever showed any emotional problems. But i let her outside earlier this week, and when she came back in she's been very kept to herself, she shakes and hides in places she normally doesn't go. She also wont eat her normal dry dog food or treats, and i havent seen her drink water and that scares me. She normally goes under mine or my parents bed but now she'll hide in the bathroom or the shoe rack, any where that we aren't close to. I do leave alot so maybe that gives her anxiety? She normalls just seems really happy when I come home but now she won't even greet me like she typically does. The weather has been very off and on for winter this year, im not sure if that affects it. Any ideas on what's wrong?