Hiya
All my dogs and cats are on Arden Grange, its the best food in my opinion that ive ever used.
They all readily eat it without having to add bits into it to make it more appealing, it never upsets their tummys even though one of my boys is very sensitive there, they are really healthy happy dogs with gleaming coats.
I wouldnt use anything else now
Think if youre wanting to put a bit of weight on your girl try the prestige one its got more fat etc...in it, then you could drop her down to the normal lamb and rice once shes bodied up a bit.
Or you could just give arden grange a ring and ask what theyd recommend