Poor Callie

As everyone knows my poor puppy is allergic to bug bits. she swells up like a balloon...refer back to this. Tonight I came home from work and my poor dog is just covered and I mean COVERED. I have never seen so many bites on one dog! All up all of her legs and a little on her back. Her left eye is so swollen too. I freak out and Jake wasn't home from work yet, so I run over to my Sister/brother in-laws house and get some benadryl (we used all ours last summer on her) and a hot dog too hide the benadryl in. The worst part is I went to look for any bugs, bees, ants anything and I didn't find one ant or bug NOTHING. So if anyone has any idea of a good safe bug/ant/ bee killer let me know. I want to get this problem out of the way before it warms up. Or something we could do different with her. I started spraying her with OFF last year and that worked really well but it is not at night when the bugs come out anymore, and it is hard because we have to chain her up because of her jumping the fence like a crazed rabbit. So please any help on the situation or anything we can do too avoid anymore of this would be greatly appreciated.

Sorry I didn't take any picture I just wanted to get her better...now she is passed out cold on the floor from the benadryl