How long for our cat to accept new dog?

It will get better. The cat is trying to be the dominant or pack leader in the house. The dog seems cool wiht this. That is a good thing because the dog could rip the little cats head off. I have the same situation. I have a 85lbs. collie that my 13lb.s cat lords over. Cat has rules the roost since day one they were otgether and she still 4 months later does not like Bella the dog. She tolerates her but does not want to be near her. If Bella gets to close to the cat, Lady hisses and sacks the dog across the face. Its actually funny to watch after you are sure the dog won't eat the cat! Be patient they will adjust to each other. They may never be best friends but they will coexsist without actually fighting.

Every animal is different, some take a little bit of time to grown accustomed to a new feline or doggie in the house or some never do! Keep in mind the way your cat see's it is "I was here first, this is my territory!" Give them time to get used to each other, don't push it and let them come around on their own. Good Luck with your new dog :)

i suggest not pushing them to get along. let them do it on there own. if the cat has been around dogs before, he shouldn't have a problem with this one. let them work it out on their own, just don't let the cat attack the dogs head, she could lose an eye. good luck !

after a year

my 3 cats still havnt excepted my dogii.