I don't think it will hurt here. I know I started putting Cow's milk on my boys Weetbix around that age. And with my eldest he started daycare at 10 months, he was breastfed so didn't have bottles at daycare and he had diluted cow's milk to drink. I really don't think it will do her anyharm at all to get her through the day. Hopefully she will drink it for you.