He might have hurt himself, but honestly if they are walking fine and eating fine. I think it's okay. You have to remember some geckos lose these toes when they shed improperly on their feet / toes. So it might not be painful
Its the same as Fauna and everywhere else. Its a dice roll. Always verify every post to make sure its legit and the seller is legit. Only buy from verified and good reviews sellers
Leopard Geckos are reptiles not amphibians haha. One thing is I do not see a thermometer with probe. You want to know the ground temps.
Reptile Carpet is generally considered one of the worst substrates because it can cling to the geckos feet / toes.
Final thing I would add, is that I would...
Separate them. Have him in his own enclosure. Looks like a small couple month old gecko.
Have him on paper tower. Bare minimum. He could be failing to thrive in competition with the other gecko out competing him.
That is my thoughts based on my understanding of Crested Geckos, and what I read...
I am not sure what supplement you are using but the spray ones are not good.
Make sure that the calcium he has access to in his set up is Calcium - Phosphorous Free, and Without D3.
What you dust his feeders with should be : Cal with D3 and a Reptile Multivitamin with out D3.
I use Calcium...
I would try to bump it up 31 - 32.
However he looks fine. Healthy gecko.
Sometimes geckos go off food, especially during cooler weather. As long as they have enough fat stores they will be okay.
You should not be feeding wax worms every meal.
Wax worms should be fed at most, Two times a month I feel...
Some pics of him would be nice.
Can you share some pics of the gecko?
What supplements are you using?
What is your supplement schedule?
What is his temps?