ORIGINAL: lorib
My Am Staff shredded a tire toy in seven MINUTES. Since she's smaller than an Am Bulldog, I would recommend the black Kongs too. FWIW, the red ones come in many, many sizes as well. Ask your pet supply place to order larger sizes!
You can also order Kevlar toys on eBay.
Speaking of these tire toys, i have a funny story.
I got Rory one that had a ropes tied to it and she would get the rope in her mouth and shake shake shake. meanwhile the tire is hitting her in the face HARD! She would get SO mad because of this and shake harder, thus making it hit her harder. Man, it prvided endless entertainment but in the end I felt bad and just got her the regular tire the next time. Cant have my baby going brain dead from self abuse, ha ha!