I feed Teurlings and Bunny KnabberHügel. I'm not sure if they are available in US, so here's some nutrition details:
Teurlings Chinchilla: protein 18 %, fat 4 %, vitamin A 20000 IE/kg, vitamin D 1200 IE/kg, vitamin E 40 mg/kg, P 0,67 %, Ca 1,07 %, Ca/P 2:1,2, dietary fiber 15 %, dietary minerals 10 %.
Bunny KnabberHügel Kräuter Chinchilla: protein 18 %, fat 2,7 %, vitamin A 17600 IE/kg, vitamin D 2000 IE/kg, vitamin E 60 mg/kg, P 0,6 %, Ca 1,2 %, Ca/P 2:1, dietary fiber 18 %, dietary minerals 8,5 %.
Our girls seem to enjoy having two different kind of feeds: the other comes in small "grains" and the other in quite large chunks. And the taste seems to be different, too.