Thread: She stop eating much

Cookie weigh 4kg (8.8lbs). Nothing change. She's always right in front of my door every time I went back home. She's playful when I started playing with her. And when I'm busy doing some work at home, she stays beside me or on the couch sleeping.
I'm feeding her Royal Canin Kitten 36 (dry food) for 13 years and then I just bought this Royal Canin Maine Coon 31 for adult because I think she may not like her food already. I always make sure she has food on her plate everyday.
I always take her for grooming every week and I'm so busy it will take 2 weeks.
Last monday, we went for her grooming and the people who usually take care of her told me that she's getting thiner. And they ask me if I comb her at home I said sometimes. They told me to buy this "mybeau vitamins and minerals:, Tasty Oil Supplement.
I like her taste it from my finger and she ate likes it. But if I already place that to her plate with her food, she did not finish it.
I'm worried and I really appreciate all your suggestions and advise.

Has she recently been wormed? No
Has she got a runny bottom? No
Is she acting normal other than the not eating? Yes
How is her mouth? Normal
are her gums red do her teeth look good? No, its seems good to me.