my google skills suck, but you can find plenty of references where people talk of strats involving CH and pets, because healing pets doesn't cause agro, or faction hits.
just one such reference, for example:
http://eqbeastiary.allakhazam.com/search.html?id=11738
"Healing pets is no aggro whatsoever, nor any faction hit. So a couple pets + healers, is great."
or another:
http://www.necrotalk.com/showthread.php?t=3909
"Note well: If your cleric only EVER heals your pet your cleric will not gain aggro and will also never gain/lose faction. This is very useful for fighting in places where your necro is KOS but your cleric is not."