Being the best animal I can: How to successfully convince NPCs as a wild-shaped druid?

I’m a relatively new player with D&D 5th Ed. and chose to play a druid. I’m still learning quite a bit about how the game mechanics and spells work. In one encounter so far, where I was wild-shaped into a goat (as bait to lure an enemy out (I’m a team player, what can I say?)) I was asked to roll a charisma check to determine if I was convincing.

Charisma is my lowest stat, favoring wisdom, intellect and dexterity to bolster nature, survival, animal, and archery related skills. I would expect that to be a convincing animal, one’s knowledge of how those animals behave, rather than charisma, is more important.

I read through the post "How easy is it to make the distinction between a druid in beast form and a normal animal?" and it seems that charisma is typically used for deception, bluffing, and acting. I think Aviose put it well in their answer, that the check depends on the type of animal and type of deception.

While I understand it is ultimately up to my DM, is there any "official" guidance on passing scrutiny when Wild Shaped?

Context clarification:

Our party was tasked with dispatching some unknown attacker that had been killing farmers’ livestock. Maybe wolves but possibly something more sinister. We surveyed the area and decided a farm animal that appeared to be lost and alone might have the best chance of drawing out the target. We positioned party members in various hidden locations in brush and trees while our putting-on-a-brave-front-but-actually-pretty-scared "goat" wandered out into the fields like a lost child.

The DM wanted charisma checks to determine whether this goat was convincing to the unknown nemesis or if it would suspect something strange. The first attempt failed (which became a point of humor), but a later attempt worked, and we managed to eradicate a few skellies.