I also use this but in the summer, I'll half fill it with water, freeze it and then give it to them. As it thaws, the water loosens the ice from the side of the bottle and it starts to make noise when the dogs shake it. I don't have to worry about excess treats and the dogs will try to get the water out for hours. I also freeze plastic glasses full of water and then run them under cool water to pull the ice rocks out. My young guy will chew happily on this til it's thawed. Mary-Anne ********************************************************************* I also do something like this , except I use a Gatorade bottle . It is pretty tough and comes in different sizes . I put rocks in it and then drill a hole in the top of the lid and near the top in the side and pull a rope through the holes. I then tie knots in the rope so they can't pull it through the holes . They love it best of all !! Connie Palmer Williams South Park Colorado ******************************************************************************************************** Gilli's all time favorite is a Coke bottle. Drop a hand full of food [or rocks] in it so it rattles and makes noise and screw the lid on as tight as you can get it. {I use food in case they actually get it opened.] They play with them for hours and once they're done - throw it in the can. -- Suzanne ============================================================================ POST is Copyrighted 2007. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxxx VISIT OUR WEBSITE - www.showgsd.org ============================================================================