I've not heard of an ear going down after the dog was 5-6 months? Not that it doesn't happen but I've not seen it in 15 years af being around russells and coloreds without "assistance". And I've seen people glue pennies, stitch metal weights, tape, etc and nothing worked other than a "crush". If it doesn't bother you, just leave it, the dog won't work any better with 2 dropped ears. I think it gives them character and personality and wish any of our terriers had that! I love it when the collie who normally creeps around with her ears back sees something and perks them forward and up, also