ferret

How do I convince my parents to let me get a ferret? I still have $225 to save up, but I would like some tips on convincing them, I have written a long essay, but what else?

I don't have a ferret yet, but I am in love with the idea of getting a male ferret. I have calculated the costs, and come to the conclusion that here in Australia, it would cost me $330 dollars [on average] to get the ferret, his cage, castrate him etc...And $100 dollars per year [on average] to...

so I was reading on how to get rid of fleas in ferrets and I saw somewhere that you can use a half dosage of the 5-10lb cat advantage flea treatment. I went to the store to pick some up and all they had was hartz in stock, and being lazy I picked that up instead. I assumed they were the same...