Is it normal for pets to progressively fight before getting along?
About a month ago my family got a puppy, a little Cairn Terrier, and he is our first dog. We've had a cat in our family for about 17 years, and she is normally very tolerant. During the first 3 weeks, our cat ignored the puppy, while he barked and whined at her. Now, the puppy ignores her, or just sniffs in her direction, but our cat now hisses at him and runs away even when he's not doing anything. I thought they would learn to live with each other over time, so is it normal for a cat and a dog to get worse before they get better, or are they incompatible?