Jack would be Mighty Mouse (because he thinks he has to "save" us from squirrels, rabbits, deer, people talking, the UPS driver, the Postman/postwoman, neighbors next door...)
Izzy would be Sam the sheepdog from the Bugs Bunny cartoons - especially when I don't put her hair up. I'll have to try to get a photo of her with her hair down.
ralph the sheepdog cartoon - Yahoo Search Results