Ok brilliant, well I'm glad I've got the food right. It's actually chicken and salmon as this was her favourite with the iams biscuits, it's funny you should say that though as our dog is actually allergic to chicken!
I'll have a look at getting a diffuser as well, and I share your opinions when it comes to cats missing each other. I mean Shadow would follow Louis everywhere, she is quite a shy, skittish cat and is also very small, whereas he was a big, black fluffy male so I think it helped her confidence having him around, they did used to go out together but since he's gone missing I just don't want to let her out, we live next to a busy road and I hope to God Louis has just found himself another home with a more comfortable sofa! I've done all the phoning around vets and left my number but nobody has seen him, I have noticed a few posters up recently though for missing cats
I don't think Shadow is really bothered about the fact she can't go out, she only ever would with Louis and for short amounts of time. She hasn't even hinted once that she wants to go out.
As for toys she does have a few balls, toy mice and pen lids she likes to flick about but she's not one for fuss or being petted, I talk to her and put my hand out for her to sniff and she will occasionally come and sit somewhere close to where I am but that's about it. She seems to mimick the dog sometimes and tries to play with her but there is a huge size difference but that again would say to me she's lonely. Another cat is an option I have thought about but I also wouldn't want to cause her more stress if that's why she's licking her fur out.