Well, I'm still in doubt about it since the animals gain a bonus to Str and Dex already. I Don't think that an additional Attribute point would be overpowering but I really wonder if they get it or not.
Point is, I'm currently working on advancing all possible Animal Companions so that I eventually have a list of readily available beasts to take - just like in Everquest - Monsters of Norrath. If I would later find out that they don't get the point, I'd have a lot of work to do to get them right again.
Maybe someone has a hard rule on the topic.
~Marimmar