Greetings, My three & 1/2 yr old cat sighs very deeply and loudly while in a sit mode....Ex: she follows me up the stairs....stops and sits in the hallway....10 seconds later, I hear a deep and loud sigh...happens numerous times Also....Ex: on my computer...she jumps up on the desk next to me....I hear something of a "gulp" when she hits the top of the table/lands.....not every time, numerous times Lungs/heart? Normal? Concerned.....would you give me your take on this situation? Thank you, thank you.....I love my girl.... Molly