All boars should have Gore and Charge, no exceptions. Boar toting hunters will eventually enter "the dark period". This period exists from lvl 24 to 48 because higher level ranks of Gore and Charge are nowhere to be found. This means that your boar's skills will be outdated for several levels. However, all hope is not lost.Even without the higher level skills, you boar is still viable in almost any situation. The boar will be able to tank, defend, and do a decent amount of damage.
Fearstalker writes in to ask if using Bite during this period is acceptable. We approve the use of Bite if you are concerned about DPS and if you promise to ditch it at lvl 48. You can refer to our previous post for information about what skills to give your boar at lvl 50.
Personally, we skipped bite and went through "the dark period" with the lower level skills. It motivated us to reach those higher levels and gave us a nice solid reward at 50.