With many different breeds of dogs there is sure likely to be one that will fit your living arrangements and personality. This way you can match up to a species that is lax and lazy or energetic and playful and anything in between.
Purchasing a dog can cost quite a bit more than a cat (depending on breeds) and then also generally eat more food. They may also require more vet visits. All in all a dog often costs overall quite a bit more than a cat.
All behaviour is dependent on the influences of inheritance, learning and the environment. Aggression may be normal or abnormal depending on the context. It is important for dog owners to be aware that aggression can be caused by underlying fear and anxiety.
Food, a litter box and a few shots every few years and a cat will tend to take care of itself. This is good for a kid that may not be able to handle the responsibility of a dog (which will require more attention). There is no need to take them outside, or really wash them all that much either. A h...
It may be easy for a child to get scratched from a cat that is not declawed (which most vets recommend not to do as it literally is cutting off their fingertips at the bone), which may also cause infection due to them digging in a litterbox when they go to the bathroom.