How can I be allergic to one dog but not another?

Never thought I would ask this, how to prepare for another one too many dog?

• Some of you might have read my last question. My dads friend's female American Staffordshire Terriers, had puppies they are BYB's they call them "pit bulls" dont even know there are 26 different dog breeds listed under pit bulls...ugh! Any way these dogs are not registered, nothing completely BYB. How ever these people have good tempermented dogs, which doesnt make a difference! No more dogs! Any way we have 3 dogs already, I am the one who takes them out, cleans their area (every day), buys their food, pay the majority of the vet bills, and spend time training them, and my school work! My dad has a food business, and he stores a lot of the stuff here in our house, so our house is crowded, he doesn't even spend time with the 3 we already have. Long story short he doesnt think 3 dogs will protect our house and he thinks we are going to get robbed (people some times) He's getting this dog for the wrong reasons Any way I have a dog that is aggressive will all dogs, male, female, small, medium, large doesnt matter he is very dog-agressive, my dad is going to introduce them on neutral grounds, but what if he doesnt accept the puppy? My dad doesnt use his brain....any way since my Ridgeback mix was attacked she doesnt like certain dogs, and if that puppy were to enter our house I am afraid her and our Patterdale Terrier mix would try to take a chunk out of the puppy, my dad is getting a female. I told him I didn't want the extra responsibility (we will see how long it will last for him to care for a dog) My APBT is the only one that will get along with the dog, she is the most dog friendly of the pack. Any way last night we went to see the puppies, sure they are cute, but not another! My dad put in a deposit last night, worst mistake every! I am stuck, do you think my male will accept the puppy? Its not fair to me because I am the one who does every thing for my 3 dogs, but then again there are people who are far from educated about dog...what do you think, I would like to hear opinions from reasonable people like you guys, I am so tired living with uneducated people who know nothing about dogs!

• Answer:

  Honey I'm reading your profile and your just 16yrs old..How do you pay for all the dogs food,vet bills and so on..Your dad is the one bringing in the money and the only one that was able to adopt or get your 3 other dogs..So really it's up to your father whether or not he wants another dog..The responsibility is on his shoulders and not yours.He is set in his ways and does'nt know the reprecussions of BYB and puppymills..You could show him videos as these are posted on my profile.Maybe that will stop him from getting another dog but it sounds like his mind is made up..