I Just Returned Home And Found My Dog Acting Strangely.

I just returned home and found my dog acting strangely. She can walk and did take a drink but does not want to eat. Her feet and legs are cold. She seems unresponsive to a degree. I felt all over her for sensitive spots, no result. Her mouth seems to be kind of clamped shut. She can open it as she did drink. Usually her mouth is open and relaxed, not now.