Squirrels provides a macro that attempts to target each of the critters from the "Squirrels" achievements you still need - and if it finds one, it performs the /love emote, and only once*, but note that macros can only perform one emote per click, so if you find one critter, press it again to see if there is another one nearby as well.
This addon works in any locale, as critter names are pulled from the achievements dynamically (at least the English client currently has a wrong critter name in "Caressed" though, but this addon considers that and targets the correct critter)
To use this functionality in another macro (e.g. mount macro, or anything non-combat that you use often) add the line:
Note: if you installed the first version, r01, you can delete its addon folder "Squirrels I Once Caressed Stub". It has no negative impact though, it just defines a function that is not used anymore.
* unless I made a mistake, of course. In that case, flame me in the comments
r10: .toc bump for 6.2
r07: use /targetexact instead of /tar, we have the full name anyway :) So we don't target similar-named mobs ;)
r04: properly recognize when a critter was successfully /loved right away. Also targets Golden Hoplings for Ling-Ting's Herbal Journey.