For Werecat, instead of Charge +2, how about Piercing +2? Piercing is more of a cat trait than Charge - aside from the Feral Bobcat and Pharaoh's Cheetah. Save the Charge +2 bonus for Weregoat! (along with +2 vs. corporeal conjurations?)
Or swap Elusiveness for Piercing +2, and that way Animal Kinship will give you Elusive similar to how it gives Melee +1 to the Werewolf. (Although multiple Kinships stack to give the Werewolf Melee +X, whereas Elusiveness will be either on or off, regardless of the number of Kinships you put in play)
Just as Jason mentioned, the cat abilities are very broad. Defences are not aggressive enough and cost way to much to balance this card. The Johktari has innate fast so that was not a good option either and elusive combo's very nice with innate fast of Johktari and charge +X. That's why I picked these, although piercing was very high in the running. I also don't want to change this card for Animal kinship combo's since it's not a popular card anyway. I don't think there is a possibility/need for more than these 2 transfusions since they could probably only be released in an other mages set or Mordok's Tome V2 or something like that. The werelizard could be nice though.
Currently I think the wolf is a little stronger than the cat so these are my idea's for tweaking:
Option A:Wolf: melee +1 & armor +1. Whenever there is at least 1 other canine creature in your zone, you gain an additional melee +1 and armor +1. (wolf pack theme)
Cat: remains the same
Option B, raising reveal cost to 2: Wolf: melee +1 & armor +1. Whenever there is at least 1 other canine creature in your zone, you gain an additional melee +1, armor +1 and his melee attacks gain d12: 10+ bleed. (wolf pack theme + bleed from iNano)
Cat: remains the same + Non-spell attacks gain piercing +1.
Which of these 2 do you think are best? Do you think they are balanced or should even version A get a higher reveal cost?