OTOH, if you treat H Ani like a Profession skill for pricing (1 sp x check result per day), it costs only 42 ~ 84 gp to get a first level expert to train the creature to fight for you (assuming your DM allows it).
1 Exp: take 10 + 1 Cha +4 ranks +3 Skill Fcs (H Ani) +2 Animal Affinity = 20
Fighting trick package (DC 20, 3 weeks, counts as 3 tricks): 20 x (3 x 7) x 0.1 gp = 42 gp
Guarding trick package (DC 20, 4 weeks, counts as 4 tricks): 20 x (4 x 7) x 0.1 gp = 56 gp
Fighting trick package + Attack any creature type (DC 20, 4 weeks, counts as 4 tricks): 20 x (4 x 7) x 0.1 gp = 56 gp
Guarding trick package + Attack any creature type (DC 20, 5 weeks, counts as 5 tricks): 20 x (5 x 7) x 0.1 gp = 70 gp
Guarding trick package + Come + Attack any creature type (DC 20, 6 weeks, counts as 6 tricks): 20 x (6 x 7) x 0.1 gp = 84 gp
You still need to make a DC 10 (DC 12 if the animal is wounded) H Ani check each time to get the creature to obey your commands.