My Mia went MIA

scared the crap outta me. All of a sudden i realized that I haven't seen her at all today. I left the house fairly early for grocery shppping and a dr appt. I came home and laid down, no Mimi. I answered the door to a very hostile ex, no Mia and she HATES this one. NOrmally she will come out just to take a swipe at him when he tries to pet her. He just doesn't get it like he doesn't get most things.......... Cleaned and changed the litter box, no Mia. Brough out the canned food dinner that is her favoriten, no MiMi. Carl always knows where to find the other two and he couldn't find her. I've done everything that I am supposed to do but since the food allergy crisis I just don't feel like she has rebounded to her previous self. She is scrawny and her coat is scraggly. I even brushed her hair with my super expensive aragon oil hair conditioner hoping it would restore some luster for her. Nada. I was afraid that I was going to find her dead, somewhere like in a vent or something. I think that it's time to find a new vet. I should really be paid by them for the outrageous amount of time it takes to examine and probably based on what i'm saying misdiagnose a cat. Poor Mia. She isn't one who likes to be fussed over or petted alot but recently she has been either sitting on the back of my chair or on my lap while im on the pc. She is almost as small now as when I took her home as a kitten in Nov of 2014. Shaun who came home in May of last year now towers over her and is easily twice her weight. I need to also figure out how to pass her some extra calories without the other two horning in on the action. They don't need any extra sustainance.