I have been raising tiger salamanders since 1976. My very first salamanders in August that transformed to land version I fed every 3 days or so just worms. I kept track of their growth and found that these animals were 4.5" in beginning and two years later were around 7". They were more on the skinny side, but not sickly looking.
The following years, I fed them daily, mostly worms, some occasional fish and wax worms only occasionaly. These salamanders would look healthy and were growing to 8.5".-10".
My conclusion was they have their maximum growth in the first 2 years, so why not give them more food.
