My baby is 6 months and was exclusively breastfed but we have started giving her a bottle or two of formula each day as my boobs are ready for a rest! we've been giving her kendamil which seems to be going fine. A family friend has just given me a huge unopened tub of cow and gate. Will it be ok to change to this one once we've finished the kendamil tub? I'm not sure how much variation there is between brands and whether it could cause any issues. Thanks 🙂.