my doggie is pretty intelligent as well and VERY destructive if she isn't challenged mentally...Some things that I do that help:
hope it helps!
amazon . com + interactive dog toys in the search engine = TONS of reading material. LOL.
- Give her half her meals in feeder toys (kong and squirrel dude - super good, cheap toy by premier) I got them both on amazon . com
- IQ treat ball; I sometimes put part of her meal in here too. only thing is that it's LOUD so if you have carpet, it works best. Good thing about this is that you can make it easier to start then progressively harder as they figure it out faster and faster.
hope it helps!
amazon . com + interactive dog toys in the search engine = TONS of reading material. LOL.