You don't need to necessarily add more ingredients. If he thinned back out and eats the same, maybe that's just his personal target weight. Also, I've noticed that in the summer, the Buggimonster drops 2-3lbs, but puts it back on around November or December. This is interesting to me, because we are WAY more active starting in mid-September through about early May since it's not 95+ out lol.
Kaleef Black Bear Bugatti
CGC, Advanced Obedience, Intermediate Air Scent Tracking,
600+ trail miles
Jackson von der Rescue Farm (schnoodle)
75+ trail miles