Beagle don't know if this will help you any or not. But being an ex Bull Hauler and hanging around a bunch of cattle traders the best thing I have ever found to remove glue is plain old WD-40. Works wonders on those cattle back tags with all the glue on them. Give me a horse brush or curry comb and about 10 minutes in the back of a cattle trailer and the cattle will look as fresh as spring water.