Dogs & cats can get along fine if brought up together. Its all down to individual personality & the surroundings they're brought up in, but you also have to take into consideration an animals born instinct too...
Two weeks ago, my best friends cat was ripped apart by a neighbours staffordshire bull terrier (typically, they didnt have it on a lead). The cat was 22 years old. The staffy always went berserk whenever it saw cats, around x3 years previously it had chased after the same cat with such force, it got its head trapped in the cats cat-flap, on that occasion, the cat turned on it and clawed its face before it could pull its head out, Im really glad it had a chance to do that- shame it wasnt the owners face instead.
Another neighbour who witnessed the attack was traumatised by the ferocity of the dog. The cat was still alive when the owner of the dog secured his pet & returned to the cat. The last (great) thing the cat did was gauge his hand deeply before it died.
Im really tired of people who have powerful dogs, yet fail to understand the complexity of the creature they own. This particular staffy is walked regularly, but I see plenty of others in my local area that arent, and which hang around young children without being on a lead. The excuse is "oh, he wouldnt hurt a fly".