ok so my male 2 y/o het orange has always been a hearty eater. i was out of town for a couple of weeks and i came back to find him unusually skinny and very lethargic. today was the first time he has ever refused a meal. he had no interest whatsoever in the mouse i put in his tub. i took it out after about 10 minutes. usually he tries to strike at the mouse before i even drop it in his tank. he doesn't appear to have any sores on him. the temps and humidity are perfect too. what could be the cause of this? what can i do in the meantime before i get a chance to take him to a vet?
please help!