Chinchillas need a plain diet with little to no variation. Treats should be given sparingly and infrequently. 1-2 per week. Many websites and owners say giving treats often are fine but as a matter of personal experience and several other breeders, we have found less is more. Chins do not need treats, they are often given more for out enjoyment than the chins. I have 'trained' my chins using hay cubes and wooden chews. Those items are not really treats but my chins think they are cause its something i handed to them