Toad almost black in color and not eating

[AmandaChau]

Last night I did a 25% water change and gave some smaller crickets. He ate 6 and kept them down. Maybe they were just to big. He went after them like a true toad should.


See pictures below (if i can get it to work)
After he/she ate ( can you tell if he is a male by this picture?)


Both of them after they ate (is the bright green one a male or female?)

[Amphibians]

Color looks normal to me