I know for me, as a parent I do not want the extra work it takes to take care of a pet. Maybe your parents are the same and if you tell them you promise it won't make them have extra work cuz you will do everything. The be sure to keep your word and their trust. That's how my kids got lizards. Lol!
Ok so i wanna get a cat for my bday but i need to convince my parents. If i buy a cat from the store how much will the vet bills cost? And i have a labrador so would the dog hurt the cat?
Good for you for mentioning a vet. Some people don't take that into consideration or even care. Vet bills could get as high as $100 dollars or more depending on office visit prices, shots, medicine and anything the vet might have to do after a checkup. Like YoWanna said, make sure you hold up your end of the bargain if your parents let you get a cat. But in the end, if you are living in your parents home, nobody here can tell you how to convince them. It is their decision to make.
if that is what you want then you should get it.
Don't buy from a store. Adopr from a rescue shelter.
Its a big commitment. 10 or more years if you are lucky ☺