Beagle aggressive with child

Question
I have a beagle that's almost 6 yrs old.  I got her from a Beagle Rescue when she was 1-1/2 yrs old.  She's great with me.  Unfortunately I cannot say the same for my son.  I had a baby a year after getting my dog.  Now my son is 3-1/2 yrs old and I'm coming to my wits end.  I can pet my dog anywhere and she's fine, my son does exactly what I do and the dog snarls and sometimes snaps to bite.  I cannot stand that my son cannot play with his own dog and I am thinking of finding a new home for her and then finding us a new dog that will be great with him.  After all, it's not about me anymore...it's about him.  However, I'm wondering if there is anything I can do that will train her to treat him with the respect she shows me.  Or is this just untrainable and she just can't be a dog in a family with small kids?  By the way, she's a beagle so she is a food hound and actually did snap at me a week ago when trying to get her away from the kitchen table.  I was reaching for her collar and she bit my finger.  Just a flesh wound but yes....she bit ME.  Thanks for any help you can provide me.  I am at a crossroads and I'm not sure what to do.  Regards, Sharon

Answer
Your dog sees your child as an equal. You have to reestablish pack order in the family and YOU have to be the pack leader. There are rarely untrainable dogs and getting your pack in order can make huge changes so fast you won't believe it.
I'll enclose a website that will help you IMMENSELY and if you can get Cesar Milan's book Be The Pack Leader it'll change your life and hers too. Beagles are pack animals with a strong  pack instinct, small things like not letting her sleep anywhere but on the floor, not on the furniture not on the bed, keep your child, at rest, ALWAYS higher than your dog. Walk her, twice per day EVERY day briskly, at heel and  on your terms. Keep her busy. Tire her out, don't over feed her, give her food stuffed inside treats. NO food , NO affection unless she earns it, she sits to eat, sits or down's to be let out, to be petted etc. Type alpha boot camp into your browser, and get the book via your library or purchse. I promise you, you will have a completely new way of thinking about your dog and a much much more satisfactory relationship with ANY dog in your life.
Happy Holidays
Cindi