What size do pacman frogs start to eat less?

[GrifTheGreat]

I've been feeding my samurai pacman everyday for a while, he/she has slowed down and only eats 1 full worm every other day to 2 days. I would say it is like an inch and a half in size. Is this normal by now to start slowing down?

Its due to winter coming starting. They slow down in winter unless they are like my oldest female. She likes winter for some reason, but she was purchased in Febuary. It is not uncommon for them to slow down a lot in winter even if climate is maintained within their enclosure.