I cant leave the porch door open anymore because every time he sees a stray animal out there now he goes vicious to everyone for 30mins, all puffed out even though they been long gone for 20mins. This is my first male cat, are they more prone to going from mellow to wild state like this? This is not good timing with my health my dad been coming over more as I am in and out of hospital. He has suggested many times with this young cats endless mysterious allergy issues, huge vet bills and stress to me that he should go to friends farm where he will have to stabilize or be dealt with old fashioned way. Do you guys think Feliway spray by the door could help?