So, I'm getting vibes that letting my little cat in the backyard may be more risky than I thought (my parents said that they heard some noise - They're not sure what animal made it - and saw Felix come running towards the house with a larger cat chasing him). I checked him over, and he does not have any injuries. My concerns about letting him outside are partly selfish (I can't afford to treat an infected wound, if it can be prevented) and partly out of protectiveness towards my little guy (he's petite - about 8 lbs - and shy - so I'm not sure he could hold his own with other cats). My concern about keeping him inside is that he will get bored with out more stimulation, and that my parents won't be able to (and shouldn't have to) put up with the transition period and him begging to go out. Felix is a neutered male. Do tomcats see other male cat (even if they're are neutered) as a threat?