succeed at

Succeed in = fully accomplish, complete; the finishing of a task is implied. I succeeded in nailing my cat to the outhouse door.
Succeed at = be successful at, do; there is not necessarily a task. I succeeded at dentistry and internal medicine, before I turned my hand to rocket science.

There may be further ramifications.

Thanks Mister M. for the light you've just shed on this difficult question (at least this is what it was to me...).
I'm chagrined to see you're not holding up animals into much considerations in your replies.
I guess then Humpty Dumpty will never be able to say that no animals were harmed in the processing of the emails you're sending... But this isn't the question anyway right

A mod is seldom caught out, Waiti.

Cat:

noun: feline mammal usually having thick soft fur and being unable to roar; domestic cats; wildcats noun: a spiteful woman gossip noun: any of several large cats typically able to roar and living in the wild

Side question here : is a caterpillar to a cat what a moderator is to a mod ? Not quite...

mod (1) :
noun (Mod) originally in the 1960s: a follower of a British teenage culture characterized by a liking for smart clothes and motor scooters. Compare Rocker.
[1960s.]

From your avatar, I didn't picture you like this

So what is nailed to your outhouse door -- a cat-o'-nine-tails or leaves of a stimulating shrub? You'd better post a picture, so you won't be suspected of cruelty to felines (roaring or non-roaring), spiteful women or young men.

Might it be a nine tails whip that Mister M is talking about ?
Although he doesn't sound much like a whipping boy to me...

It was an informal youth who asked too many questions.

We then flogged him soundly while chewing stimulating leaves and listening to some entertaining gossip.

He certainly knew how to roar by the time we'd finished with him.

The X-rays will be posted shortly.

MrP