In 2012 I bought my 2 y.o. Bristlenose pleco a cave from plecocaves and he started using it right away. He comes out very infrequently and in the past 6 years I have seen him out about 20 times. Should I remove his cave or leave him be? BTW, vegetables and food will not coax him out. The only thing that did were several live ghost shrimp which were for my Bolivian ram which he (pleco) ended up eating. I have driftwood as well. He also stays inside if I need to remove him for a water change. He just sits in the cave and I remove the whole thing with him inside.