
I agree, go back to the Akita's breeders & see if they will have him back. Having said that, I have to say that my Akita - who will not tolerate other males, was absolutely wonderful with my last puppy. She wriggled into his run when she was 8 weeks old (about Yorkie size) - I nearly had a heart attack when I looked out of the window & saw her!!!!! Since then, they have been the best of friends - until 3 wks ago when she was mated, now she turns into a Crocodile every time he tries to play, so he just stomps off, hurt.
Akitas are usually only aggressive towards dogs they see as a threat, so little dogs of the opposite sex are usually OK. It's pretty heart-stopping when you first let them together tho'!
If you took him on, do you have the facilities to keep them seperate while you are out? I would never, ever leave an Akita & another dog together unsupervised, if the other dog annoyed the Akita unbearably, the Akita has such potential for damage it's just not a risk worth taking, especially when there is such a difference in size.