Where these Tincs the same you got in 2010? If so, took them a while to get in a fight. Well, you could have removed the smaller frog out as soon as fight was noted and maybe that would have changed results.

With animals in captivity, the "loser" of a fight can't get away from the "winner" and the increased stress usually leads to malnourishment and lower immunity. Then an opportunistic pathogen does the rest. Sorry for the Tincs death .