Puppy & Cat Problem. ?

First of all i have a 6 month old staffordshire bull terrier cross
My cat who is immediately 3 doesnt like her at all she hisses when the puppy goes to sniff her i dont know what to do as i maintain having to close doors 24/7 and its not fair on them both
so anyone no how i can cause them get along better without the cat hissing and being anxious off my pup? thankss i apriciate it so much.

xx
What animal make a apt pet?
Answers:    It is better to have a trainer present to show you this but this can help. In a nutshell you hold one animal at either end of the room. A person holding one animal (aka you will stipulation two assistants). You walk over to the cat, make nice, stroke her for a second or two and whether she is into treats, give her a tiny bit of one. You go over to the pup and do the same. Do that a few times put a bet on and forth. Move them 6 inches closer and do the same routine. If anyone reacts badly or hisses or growls afterwards no treats. You reward neutral or positive behaviour. Take a good week to do this. About15 minutes a morning, 6" closer each day.

Key is to keep the animals parallel and facing matching direction. (Sides facing each other and facing in the same direction.)
Exotic animal for a pet?   Are enormously Gerbils well brought-up pets?   Isn't it cruelty against animals to stuff the poor turkeys? That must hurt very badly?   Is this Part of Rabbit fur?