Oh new thread on Party Pets :) Nope not working and haven't for awhile. Some Blizzard change that has them stumped. My work around is to add the pets to my Main Assist list and watch their health with that. I also use a macro for each of my healing spells and for decursing/poison with the [target=mouseover] that are keybound. (I use Grid for everyone else) works like a charm until they get the party pet feature fixed. Patience is a virtue :P
Hope that helps.
Also, when playing in groups on my healer, I usually set the most important pet as my focus target so I can see and heal it that way.
Thanks.