Hello everyone, I am looking for ideas on a problem I am having with my Petmate fountains. The fountains work fine, but one of my cats has figured out how to pull the filter out of the fountain through the hole the water comes out of. At first I thought she was somehow managing to lift the lid, so I used duct tape. But I caught her in the act a couple of days ago and saw how she was removing the filters.

Any ideas would be welcome!