[Nancy's Hamsters]

Elliiy do you feed any basic hamster food with kibble bits or seeds which are the color green or Blue?? Kaytee Hamster mix is one I am aware of that will change the poops to green when the food dye mixes together in the body.

Also what consistency was the poop that was green? Firm like a normal color poo or kind of soft? If firm I would bet it is just his body getting rid of the useless food dye. If kind of soft then I would agree with AH and a Vet visit to rule out any illnesses as green poop can indicate extra bile being produced do to and infection just starting, or and upset tummy which since Hamsters can't vomit could mean troubles if left unattended.