Willow is about 10 pounds. Right now, she's down to 8 or 9, but that's because Rex has been particularly insistent upon being a complete prat; I need to provide her with more Lurking Spots so she can get away from him. If you can feel her spine easily, she's Too Thin. If she is spherical when sitting regally, she's Way Too Fat. My general rule of thumb is that if I can find the base of her rib-cage easily, she's okay.
Feline fat-to-size ratio isn't all that different from humans', and I'd be surprised if you didn't realize if she gets too fat.
Some cats (like Willow) can self-feed -- have dry food available at all times. If a full bowl means Perrine Must Empty It Now, then I wouldn't recommend self-feeding. :) Otherwise, let her decide; if you're lucky, she'll self-regulate.
(Apologies for not using a Willow pic -- her Pink Mouth Of Doom photo is adorable, but my LJ pics have gone wonky. It doesn't bother me enough to be worth fixing. :) )
On feline porkiness.
Feline fat-to-size ratio isn't all that different from humans', and I'd be surprised if you didn't realize if she gets too fat.
Some cats (like Willow) can self-feed -- have dry food available at all times. If a full bowl means Perrine Must Empty It Now, then I wouldn't recommend self-feeding. :) Otherwise, let her decide; if you're lucky, she'll self-regulate.
(Apologies for not using a Willow pic -- her Pink Mouth Of Doom photo is adorable, but my LJ pics have gone wonky. It doesn't bother me enough to be worth fixing. :) )