Puppy love and puking cats

We currently have two pets, one indoor cat and one small 10 year old dog. That is plenty for me. Especially when the cat decides to make an escape to the great outdoors (even though it's raining) just long enough to eat grass, come inside and promptly throw up her body weight in four different places. We used to have a big dog that did that on a regular basis - I really can't say that I miss him very much. I don't miss the dog hair either - he used to shed more than I thought was possible for any creature. According to my calculations based on how much hair I used to sweep up every day, he should have been completely bald after about a week. The circumstances under which he left us were traumatic (he bit the friend of my girls), but my children have been campaigning for a new dog ever since. Really?? After all that? It's not that I'm anti-puppy, per se (I mean, they are cute and all), it's just that I prefer to go to a puppy store, play with them all for an hour, then leave them and go home to my non-chewed shoes, dog hair-free, non-puppy whining environment. I'm not in any hurry at all and have been very picky about what kind of dog I would even consider owning in hopes of slowing the inevitable. It's not working.

My middle daughter (age 11), the biggest animal lover I know, has taken it upon herself to research breeds, decide which one would best fit my strict criteria, find cute puppy pictures to email me daily, email breeders and pass on their contact information to me, and generally work tirelessly toward her end goal of acquiring a new puppy as soon as possible. How can I possibly keep saying no against all that? I do have to say that her choice is probably a good one (mini Australian shepherd), so I'm mentally preparing for a puppy within the next year. At least we have tile floors...