As a good enrichment tool, the tall feeding pole does have it's pro's & con's just like any other enrichment device. SLWAP has blown it's trumpet far too many times regarding that they devised such a device as well as other very outlandish ego tripping claims. PETA in the US have made claims that big cats using such enrichment tools have came to harm. There is very little to show in journals that any harm has been done with big cats let alone leopards etc. As far as I know, could be wrong, but the best person on the topic of bone density would br Dr Andrew Kitchener at the National Museums Scotland, where he is the curator of vertebrates. He has written numerous reports and papers on bone density in bears, which I know as the Asiatic Black Bears from Glasgow was used in these studies. Exercise is of course required but it depends on the type, the frequency and if the establishment is good or not good at giving such. Frequency for the feeding pole is seen at most establishments as being far too much. In other words, such collections over-use this tool for gratification and audience means. Just as one collection which is deemed unfit for its purpose has cheetah running on a zip wire and the frequency of that tool is over-used and is ego driven rather than for welfare and behaviour purposes. There is good and bad in all things, getting the right balance is hard to do but worth it. The pole at Glasgow did not result in any injuries and bone weakness, again the feeding pole was used nowhere as frequent as today's collections. Nanook, try reading ABWAK's Guidelines For Environmental Enrichment as well as some other books and journals such as Robert Young's Environmental Enrichment For Captive Animals or the Guidelines by Dr Graham Law used for Exotic Felids in Captivity. I do agree with Nanook that SLWAP has shot themselves in their own foot and blowing their own ego-driven trumpet