
She will eat when she is ready there's no great hurry.
I usually start my pups on semi solid food at 18 dauys, but ahve ahd litters wehre they were so satisfied on Mum that they hardly ate anythign until foru weeks,a dn thsi is a medium size breed with normal size litter.
Even were you not keeping her usually toy breeds go to their new homes later than 8 weeks, and I am sure by then she will be eating.
Just keep offering her food, and let Mum have it if she doesn't want it, let her see Mum eat it.
At some point Mum will be less giving re the milk-bar and she will eat.