My cat, Tipsy, is 7 years old and has always been very healthy. Each morning around 5:30 she meows quite loudly for her food. She walks all over the bed, meowing for her breakfast until I have to get up and feed her. This morning she did not demand her food and never made a sound. She didn't even meow when I tried to look in her mouth. Her eyes are clear and her nose cool to the touch. I picked her up and she did not seem to have any soreness or be in any kind of pain. She normally follows me around but this morning she just sat on the bed not making any noise whatsoever.....this is totally out of character for her. She did not eat her breakfast and didn't even eat the treat I gave her. She did not seem lethargic but at the same time not as active as normal. What could be wrong?