Seed & nut mix?

[Leia]

Hi everyone. I'm concerned about what I am feeding my cag. Initially I fed her pellets and a variety of fruit and veg along side the pellets. She used to enjoy her food but still wanted her handrearing porridge at night at the age of 4 & 1/2 months. She stopped the porridge when I introduced a nut and seed mix which I initially wanted to give her occassionally. But she kept nagging everytime I put food into the cage until I gave her the fruit and nut mix and would only eat the nuts and seeds and leave the pellets out. But I'm concerned that it's too high in fat and will lead to weight and liver problems in the long run. I've tried stopping her, this is the 2nd day but she keeps nagging despite the fact that there's softened pellets and nice veges in her cage which she previously used to love? I need some help? Want to know if I'm doing the right thing by stopping her from eating that?