We and our pets know those Elizabethan or lampshade collars are the pits. Here’s a handy do-it-yourself alternative for protecting an incision or wound site on your pet’s torso from Instructables. You’ll find good instructions for making a body sock or “cat jacket” out of an old t-shirt.
This could also be used on dogs, rabbits, ferrets, etc. It might not be enough to stop an obsessive pet from messing with their stitches, but I think it would work with a lot of pets. A side benefit could be that wearing this body sock might help curtail their activity, which is another post-surgery need. Try it out!
Check out these other alternatives to Elizabethan collars: