After a day out working or a good long walk my young dog Ruby is continuously restless, throwing herself round the garden / house when you'd expect her to be knackered and quiet. She flicks her back legs out, rubs herself off every surface, goes round in circles trying to get comfy on the bed and gives out a quiet whine...basically she just moves at 100mph and clearly something is doing her tits in....I've checked and checked again and there are no thorns, grass seed etc stuck anywhere...so does anyone have any ideas what the hell is going on? She usually goes back to normal about 2 or 3 hours