I just brought home a new male kitten that someone from work found. The kitten is not afraid of our dog and the dog is fine with the kitten.
However, our female cat is mad as heck. She is making an awful sound more like growling than hissing (her fur is not puffed up at all) she is following the kitten around and giving it the stink eye. Is there any hope she can adapt to the kitty? Anything special I should do? The cat is also growling if the dog gets near her and slapped the dog a few times. she is mad and is letting everyone know it. Any advice would be great.
uh… i hope the new guy was checked out by a vet before being brought into your household? not a real good idea to bring a new player home without a clean bill of health first.
in any case, your girl kitty isn’t a happy camper because there’s a new sheriff in town and it’s only natural her nose would be out of joint.
i brought home a little girl to my older boy in the spring and he was NOT AMUSED by this. it took a week or so for him to cool off. today they get along well enough if not exactly bosom buddies.
just keep an eye on the players to reduce any potential bloodshed, and give it a week or so, as i said. the other option would be to separate them with a baby gate so that they can see and sniff one another without actually coming in contact so they can get used to one another that way. i’m sure other cat owners will have additional advice as time goes on. good luck with the new overlord! 
Yep, baby gates or screen doors for a while. I’ll second the “Vet Check ASAP” advice - and pay the extra to get all the communicable kitty diseases checked for.
Shouldn’t this be “HALP!”?
When I brought my new kitty home, my roomie’s cat was not amused.
I kept Olive in my room for most of the first few days, and we let them smell each other by opening the door just a crack. After that we let them hang out, but only if one of us was home to supervise. It’s been a few months now, and while they’re not best buddies, they’ve learned to tolerate each other.
One technique the shelter suggested was letting them switch sleeping blankets/pillows after the first night, so they grow accustomed to each other’s smell. Also, the shelter stressed that when they do interact, even if one starts acting all pissy, not to yell or scold either of them, but to encourage them in a low soothing voice.
Good luck getting your older cat to soften up. 
You should isolate the new one in a bedroom or bathroom for several days letting them smell each other.
A good way is to give them each a cat bed and then switch them after a day or two so they get each others scent.
Another thing you can try is so place a dab of Vanilla on the tops of their heads and the tips of their tales so they have the same smell.
The new baby should be supervised at all times when he is exploring and should never be left alone with the cat or the dog until you can be sure nothing is going to happen.
It took at least a week for me not to be certain I’d ruined my previous cat’s life. Now they’re sweet as sweet can be (they wrestle but they don’t mean it.) Definitely get the new one checked out. And post pics.
Great advice here so I’m not going to add any - except to say I use fresh rosemary instead of vanilla.
But you know the rules - where are the pictures?
The kitty has been to the vet,so no worries.Here are pics of each of my critters
I haven’t got any really good pictures yet,but it’s a start.
Echoing the good advice about a vet visit, isolation (I use a spare bedroom), time, etc.
It took one of my cats almost three months before she accepted a new cat. It may seem like a total disaster at first, but time makes everything good.
Part of the problem is that your old cat feels HER space has been invaded, and that the attention of HER human servant has been stolen by the new kitten.
And that’s probably accurate – there is a tendency to pay more attention to the new kitten. So be sure you spend time with the old cat. One idea is to sit with her on your lap, and pet her while the kitten explores around the room. She will still growl at the kitten, but you may notice that her growling takes on a bit of a gloating note: “you may be the cute kitten, but it’s me that’s on the lap being petted!”.
My cat is not affectionate at all. The only time she wants any attention is when I use the bathroom, then she races me in the room and develops a case of elevator butt. I will continue to satisfy her bathroom fetishes, so I don’t think she needs to worry. I agree that she definitely has a bit of territorial disorder. She may get freaked if I have a strange dog in the house but I’ve never seen her this mad. Hopefully she’ll sulk for a little bit while she plots our demise,once she figures out that I’m the one that feeds her , she’ll get used to the newest addition.