Druids and animal companions

[nemafow]

Something that has always bugged me is the animal companion of the druid allowed to increase in size as its hit dice increase?

For example if said druid has a wolf animal companion, when the wolf enters the hit dice advancement noted in the monster manual from the druid leveling, is said animal companion allowed to increase to large?

Simple question, but if possible can you point me to a specific ruling for this, if it exists. As I would like my players to be aware of the proper ruling.

Thanks in advance.

[Prime32]

Something that has always bugged me is the animal companion of the druid allowed to increase in size as its hit dice increase?

For example if said druid has a wolf animal companion, when the wolf enters the hit dice advancement noted in the monster manual from the druid leveling, is said animal companion allowed to increase to large?

Simple question, but if possible can you point me to a specific ruling for this, if it exists. As I would like my players to be aware of the proper ruling.

Thanks in advance.

I do not believe so.

I don't remember a specific ruling, but the Elemental Companion alternate class feature (Complete Mage) states that at certain levels, you may advance your companion to the next size category or increase its Hit Dice.

[Runestar]

The 3.5 FAQ does clarify that your animal companion will not increase in size this way.

[nemafow]

Excellent thank you very much guys.