Whether unions are allowed to stake towering, inflatable rats and cats on public property in Grand Chute, Wis., remains to be seen. However, the 7th U.S. Circuit Court of Appeals recently made some rodent-related observations on the case while examining the issue of free speech.“Rats. This case is about rats. Giant, inflatable rats, which unions use to demonstrate their unhappiness with employers that do not pay union-‐scale wages. Cats too — inflatable fat cats, wearing business suits and pinkie rings …