

Is my cat becoming a chonker?
This is Cream. She is 8 months old. Last vet visit was around 5 months for her spay appt, where we asked if he thought she was gaining weight. He said not really, and suggested that since she is still underage, we free feed.
However I am concerned since I can't really feel her ribs, unlike her brother, same age, same weight (3.6kg) who looks and feels skinny. We stopped free feeding and are giving them monitored quantities three times a day, but I feel terrible seeing them run around the house looking for food. Should I resume free feeding?
They eat kibble daily, and wet food twice a week as a treat.