This is probably a stupid question but do garters make little hissy noises when annoyed? If mine have done this before I seem to have forgotten.

My 2 year old male flame has been off food for a few weeks, seems healthy and actually did eat a couple of chopped up pinkies the last two days (because temps have been unseasonably warm) but he is making little hissy noises when I offered him food.

Could it be from annoyance or do I need to have him vet checked? He seems healthy otherwise.