My cat is usually one to go out quite often but always stay around my area. Recently she went out and didn't come back for 5 days and as soon as she jumped back in she was incredibly quiet and still which is not normal as she's usually really loud and meows a lot. She came in really skinny as well (i could feel all of her bones) I gave her some food which she instantly ate and gave her a bath, once again she was so quiet and still. Now shes shaking a lot?? i'm really worried about her I'm not really sure if theres something special i can feed her, should i take her to the vets?? is this a thing cats usually do? I just want the best for my kitty can anyone help?