Christie,

Welcome!

You're certainly welcome to make your own pattern using the freePatternWizard, and also, there are patterns and images out there for free all over the place, so if you find something you like, the work may have already been done for you! Doing a search for "deer head knitting chart" can give you some results. I'm not sure what you're looking for specifically and the size, but these are just a couple of examples of what's available:

Sometimes it's not even necessary to reinvent the wheel.