Before the last patch I would use my pet to tank all the time. I did CoV progression with my pet tanking for 3 different alts. Group 1 Bst / Chanter and 2 healer mercs Group 2 Bst / Cleric and 2 healer merc ( I was lazey and just didn't want to tab to heal ) Group 3 Bst / New alt and 2 Healer merc. In all 3 cases I was playing the bst and just using 2 merc to heal my pet. This is the same thing I ran in ToV and TBL as well and never had issue with the pet tanking before. After this last patch my pet had been falling over dead. I had to increase the healing to him by loading my own pet heal. Something I used to never need before. With the new alt I have return to ToV and even in ToV my pet is going splat. I have the new CoV raid EM and so my pet should be stronger then it was in ToV but yet it not. I had no issue before this last patch but something changed. I know proc were changed and so maybe pet not procing the def rune like it was before ? Other I talked with have said there pet are more squishy as well. Also some have said pets are not holding aggro like they used to. So again I know runes are great way to get aggro. So again I think the change to proc has had a side effect that cause pets to become squishy. Maybe it something else but in any case I feel like pets have been nerfed intend or not.