they are still young yet.. keep trying as they should start to show more and more interest over the next week.
I have had bubbas who I struggled to wean.. sardines is a really good one.. to help with weaning.. mashed up with a bit of warm water... maybe some coley fish? Raw chicken mince from pets at home defrosted served raw with boiled water poured over the top..
I have a litter at the moment who weaned themself and started eating solids at 3 weeks old. I have also had litters where I was pulling my hair out as they had not touched anything by 5.5 weeks old.
Best of luck with the bubbas
waiting for piccies please