It does sound like Kyra has trained you well

I wouldn't leave it in her crate with her during the day. . . that's the equivalent to free-feeding, and gives her the option. She'll still probably pick at the food during the day, without getting a full meal in. You should try to just set her food down for 15 minutes in the morning, then 15 minutes in the evening. Pick it up after 15 mins, even if she hasn't eaten. She won't go more than 1 or 2 days without eating!! Since you also want her to gain weight, you could add meat or veggies to her kibble.