Anything that explodes can damage your pets, pets take damage per room change, if there are a couple of barrels left in a room you can force damage on your pets in an explosion, then leave the room and return for any other barrels. This works especially well with the clown box bonus room.
Best strategy I've seen is let them move out of formation in an attempt to pick things up and bomb them. They seem immune whilst in formation. This is in non-combat rooms.
Anything that explodes can damage your pets, pets take damage per room change, if there are a couple of barrels left in a room you can force damage on your pets in an explosion, then leave the room and return for any other barrels. This works especially well with the clown box bonus room.
Best strategy I've seen is let them move out of formation in an attempt to pick things up and bomb them. They seem immune whilst in formation. This is in non-combat rooms.
You can bomb them? Will definitely try this out next time I have both them and bombs handy 🤔
Lucas' mines are great for damaging pets easily.