I took my pony of grass she was FAT before i did so and shes on hay twice daily and her feed and supplements because she gets stomach Problems. And she is soo much calmer not lazy just is happy and the grass stopped making her cray cray 😂
Lunging is great! If you need to reduce its feed some do so, but DONT reduce it if it takes away the nutrition she needs to stay healthy. Working up hills is a great workout too.
Lunging with no equipment walk/trot and slowly move up to a canter and help her/him collect and use the backend and then work up to ground poles and then cavaleties