I haven't seen those in my local Asda.
I did buy some for mine in Asda in summer, but they were more like thin T-shirts, think they were about £2.50 each.
I've taken to knitting jumpers for mine, was given 3 books of dog coat patterns for Christmas presents last year
most of the patterns are a bit big for my littlest ones so I just size them down.
Mine shiver when they go out without a coat now. It's bitterly cold up here where I live, high on the West Pennine Moors, with a constant wind that blows straight through to your bones, plus horizontal rain most days
