Hi jpower30,

I do get where you're coming from here. It is possible to round out the chin by adding another form, shown in the rhino head demo I shared with you and also in this tapir head demo. You will need to plan ahead for this, making your boxy muzzle a little bit smaller than what you want the finished head construction to be, so that you can add more forms without the head getting bloated. If you're drawing the whole animal and the head is quite small on the page it's fine to keep things simple, as seen in this demo.

I understand that frustration with forms coming out larger than they need to be. (I've been there!) Some of this comes down to making sure that you're taking as much time as you need to observe your reference, and to plan your construction. Once you've analysed your reference and decided what form you need to draw where and how big it needs to be, use the ghosting method to give yourself the best possible chance of drawing the mark you intend to make at the size you want. Sometimes despite our best efforts we won't make the mark we want to. When this happens, commit to what you have on the page and continue as if the form is correct.