Are cats allergic to anything?

my kitten is now 5 months old and i've bottle raised her from 2 weeks old so she is SPOILED ROTTEN! she'll sit on my shoulder when i'm eatin and want some of everything i eat. she usually gets some stuff. and she acts like my little dog is her momma, so anything he eats she HAS to eat. when she hears him eatin, she'll come runnin, no matter what she's doin or where she's at and eat with him. it's cute, but i'm just curious if they're allergic to some human foods like dogs are. thanks everyone!