I like the Leo personally...http://www.doggoneclean.com/index.asp?P ... ProdID=225
I use it mainly for Score, and it'll occupy him for a while...I can shove treats/biscuits inside so he can crunch them, but I can also stick softer stuff in...so he can't just crunch it into little pieces. Treats can be shoved into the neck of the Leo...or peanut butter/cream cheese/etc can be put inside.
It's held up well to repeated squishing from Score's jaws. It's quiet too.
I also like the Treat Stik...http://www.treatstik.com/
I put kibble inside of it for Score...and he'll bang it around to get the treats out...but I'll also stick in some stuff that doesn't come out as easily (lamb lung, jerky) and he'll spend a while trying to chew them out.
I don't use them as much anymore...as they were geared towards keeping him busy at flyball tournaments...(and he runs now). But they used to keep him quite busy over a weekend.
"I don't have any idea if my dogs respect me or not, but they're greedy and I have their stuff." -- Patty Ruzzo
"Dogs don't want to control people. They want to control their own lives." --John Bradshaw