Orphaned partridge. Any and all advice welcomed massively

Hi there. I was hoping for some advice on what to do for a baby partridge I scooped from the road next to it’s clearly deceased mother and siblings. It cheeps strongly, and is about the size of a cream egg (when curled up). So far I’ve got some crushed layers pellets in a dish in a cardboard box filled with sawdust, in my quiet cat proof bedroom, but I’ve heard they like insects? As much advice that can be given would be wonderful and greatly appreciated, google is proving rather unhelpful for specifics. Thanks, Lizz (and Miguel - after the San Miguel box now housing the poor thing) :)