There's a ton of bits that can be done with most any small (easy to hold) animal such as small to mid-size rodents such as popping from the pages of a real story book, empty boxes (think of a large match box that's empty but then you open it to reveal a sleepy little fella in his bed... I'd hope you can think what we're talking about technique wise)
Study material for Canary manipulation in that most of the holders and steals can apply to a small critter... one of my favorite adaptations I've ever seen was a guy at the Magic Castle many years ago did a bit in which he smashes a rat and wipes up up with a bright colored silk... he shows the image of the flat and smashed critter, drops the silk down whilst holding one corner only. Gives it a bit or a flip and voila! The little fella is seen climbing out of the folds of the scarf and up to his hand... the scarf is opened to show no more smushed rodent... ala Doug Henning's popular bit using a small parrot.
I wish I could remember his name, there was a guy by in the 80's that manipulated Rats and Crows/Ravens in much the same manner as the traditional bird act... it was quite a nifty piece of business. The other guy from the Castle that worked with a Psychic Rat was the club's former Seance Medium, Mark Edward (but then, he did a floating dog for a while too

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Hope all of this helps
