Jermlaine are Tiny, which means they require only 1/4th as much food as a medium creature. They also have a +6 racial bonus to Wisdom. So, a 1st-level Jermlaine Commoner with Skill Focus (Survival) could feed themself and 23 others with their daily foraging.

According to the internet, reptiles need to consume only 1/8th as much food as mammals of the same size. I haven’t been able to find anything in the D&D rules to model this. Does anyone know if it’s been addressed anywhere?

If anyone is curious, the internet says birds consume 40% more food than mammals of the same size. Since Anthropomorphic Bats have been brought up, I’ll note that I suspect bats might be closer to birds than to other mammals in terms of metabolism, but I haven’t checked to verify this.