I think one of the most important things for dogs is enough exercise and walks/runs. I hate to think of a dog shut in a house all day, not walked much and feeling lonely and bored. I reckon it makes them frustrated and bad-tempered, maybe even vicious.

Logie and Molly are taken out very early each morning for about an hour's run over the fields around the village then again in the evening. They go to training classes twice a week (collie and spaniel, both are intelligent, purpose-bred breeds that need activity and 'things to do')
During the day, their owners are around and play with them in the garden. They do have a lovely life.

Molly seems to be a very popular name for a dog. I know three Mollies!