The really weird part is that NEITHER owner realized they had their dogs switched. I'd have thought at least one owner would have known and for it to have gone on for 3 weeks is unbelievable!

I've only had to board a cat once and aside from the fact Dusty had VERY distinctive physical traits making it darn near impossible to mix her up with anyone, but she had a collar on when I took her that had her ID on it.