Californian big horn sheep

Keep seeing shots as the light deteriorates late afternoon so yet another poor light shot! I need to see some blue sky one of these days!

Oops... Just noticed that the ISO has been set at 3200 for ages! In my
feeble attempts to get off auto I guess I was playing with it one day and left it there! Could this be why everything has been so grainy? Was starting to think my camera was malfunctioning!