My ferrets get Wysong Ferret Epigen 90 starch free kibble. I really like it!
A few of the Wysong products are less than satisfactory IMO (vegan cat food, really?) but they do make some outstanding products.
Ferrets: Wesley, Percy, Owen. RIP Bandit
Fish: Pip, Logan, UnNamed DTHM
Bird: Kita- Sun Conure