Feeding/ overfeeding a spotted sal.

[MDH16]

We just acquired a 3-4 inch yellow spotted.
We've only had him a week or so and he's learned to associate opening the top of his tank with chow time, he'll come out looking for food anytime the tank is opened.
The little guy is not shy at all, and is a voracious eater. We're feeding him earthworms, usually 2-3 1.5 or 2 inch worms every other day. Is this two much/ little? His behaviour leads me to believe he's hungry, or are these the kind of animals that will just eat and eat as long as there's food to be had?
Interestingly, he'll even nudge your fingers and bite if you hold them in front of him long enough.
He's great fun but I want to make sure we're caring for him appropriately.
Thanks

 

[Niels D]

That's so fantastic about tigers. They're really enthusiastic eaters. Watch out for obesity though, but how you're feeding him at this moment shouldn't cause him any troubles. You can see if he gets a bit obese, so you can change his diet this happens.

 

[Kaysie]

Spotted salamanders are pudgy, but if his belly starts being significantly wider than its head, it's probably too fat. If it's legs can't touch the ground, it's definitely too fat.

They're opportunistic feeders, so whenever food is available, or they think it's available, they'll come begging.