A few years back I used to take my cats outside on leashed walks. Both enjoyed this very much but I ended up stopping the practice because my male cat throws a fit once he comes back in the house, howling and trying to get back out by tearing at the windows and door for hours afterwards. Once he even bit me in the face when I picked him up to carry him back in at the end of a walk. I tried giving them treats, sardines etc when I bring them in to try and make him associate coming back in with something positive but it didn't work. Eventually I gave up in taking them outside because of his "tantrums" when coming back in and eventually he became less obsessed with getting outside. The issue is though that I would like to start taking them both out again to give them some enrichment and fresh air, sunlight etc. I also think my female cat may have developed boredom induced over grooming and I think going outside might help with that. I can't leave him inside while taking her out though, he flips out when I do that too. Is there any way to resume his trips outside while preventing his "freak outs" when its time to go back in?