BellaOnline Forums Education Biology human vs animal digestion

Does anyone know of a resource for teaching an upper elem & middle school kid the differences between human & animal digestion?

They have just finished human digestion in depth and asked about how it differs from animals. I was going to pick books about a variety of animals, but it's not easy finding readable/interesting books about animals that cover digestion.

TIA!

Have you checked the sites for national geographic and discovery channel? Here is what I got thru a google search:

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I didnt think about grossology, we have several books in the series! Big duh!

Check overstock, you can occassionally pick up the grossologies for $2 or $3.

Thanks!!
Meg