I was so mad when delivering an avon order once, this family had got a new puppy, said o he'll be interested in me cos he can smell cats....they then proceed to ask if I want their hamster as they can't afford a hamster and a dog! Erm, if you can't afford a hamster, how on earth will you afford the vet bills etc for a dog - plus what does it teach children, you just replace/get rid of your pets when it doesn't suit you anymore.
It took me ages to convince my parents to let me have a pet, they were worried I think that I'd be like my older sister and they'd end up looking after it, when I was 11 I was allowed 2 goldfish, a year after a hamster, and after a ridiculous amount of pleeding a rabbit when I was 15. All of them I took care of, parents paid for most of their up keep obviously, but I did save my pocket money to get a bigger fish tank and once I had a saturday job I paid for more of the day to day things myself. I really don't understand how people can still think it's fine to give pets as a present to a young child, and then be surprised when the child can't/doesn't want to look after them.