I have a puppy that is not a year old yet and she's mixed with a miniture doberman,piranha and kangaroo.?

i can deal with the kangaroo part of her,but the piranha; she's always into everything and i mean everything. chewing anything she can get in her mouth,even the legs on the kitchen chairs.come to think of it she might have a little of beaver also. Though i would not get rid of her for the world...so can anyone tell me how i can break her from the piranha part to keep her from chewing up and tearing things up. she's chewing up all her toy's.. THANKS to all that can help.