I never get why people say that, or why some people think it's weird to watch cartoons that are for children when you're an adult.
With this My Little Pony, that show is for little girls yet grown adult men watch it and it's considered 'cool', but if a little boy wants to watch it he gets bullied, called a girl, sissy etc. I never watched the new MLP, last MLP I ever watched was the old Swedish version of 'Gen3' when I was 10 years old. I personally have no interest in watching this new one, but if guys want to watch it, let them not hurting anyone.
Just because you're an adult by law does not mean you have to suddenly drop everything and be all mature and serious...well you can if you want but sounds like an awfully boring life never just doing something for enjoyment.
Never saw this Felidae you speak of, but looked up and yeah..characters being murdered and having sex does not seem like a childs film to me, even if it is about animated kitty cats. I would imagine many kids would want to see the 'cat movie' and end up highly disturbed.
I know a 8 year old who thinks she is too grown up for 'cartoons', she is my next door neighbour and I tried lending her some of the old animated Disney film DVDS when she was stuck at home sick, she told me to get that 'baby junk' away.
I'm 20 and love Disney and Animation...so why is it suddenly too babyish for 8 year olds? Hehe..wait until these kids really are adults, then they'll realize how much childhood they missed out on trying to be one back then.
Meanwhile I'm gonna check out the shows people mentioned here.