The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence. 

A dog will follow his master anywhere, but a cat keeps to the house it is used to. And even when the house changes hands, the cat will remain there, so long as it is kindly treated by the new owners. A cat does not seem to be capable of the personal devotion often shown by a dog. It thinks most of its own comfort and its love is only cupboard love.

（） between dogs and cats.