Another point that Guest may be interested in: cow is pronounced coo and in the West coast of Scotland there is no long u (oo) sound. It is pronounced like the French short u or the german U with an umlaut over it. If you look at written Scots, especially the poems of Burns, you'll see that words like poor or good or book are usually written with ui instead of oo. This is a signal to non West of Scotland speakers that the short oo should be sounded.