Need help with my dog's breed?

I was wondering if any of you knew what what type of breeds my mixed dogs are. The mom is a chihuahua, fairly positive, but i have no idea what her children are mixed with, ill attack some pictures of them. The mom is the one with the short coat, and here children are the rest. There are 3 children, the two bigger ones, the white one and the spotted colored one are from the same litter, and the smallest one (the one in the corner in the first picture from the link) is from her second litter. Im am un sure but by the looks of it all the children have the same dad judging by similar coat types.

Pictures of my dogs: http://imgur.com/a/hgIOj