Having lava hounds self destruct manually or when defenses are gone is a terrible idea.
First I understand how nice it would be but that takes away from some of the strategy of using the attack. How many hounds do I really need? Should I take 1 more hound or maybe some minions for cleanup?
It would also make the attack to OP, Oh I would just bring 5 lava hounds even though I really only need 2. Cause no worries I can just protect all my loons and once they get rid of defenses bam now I have a ton of pups to do the cleanup.

