Tamad minsan mag bottle feed

7 months and 16 days na ang baby ko. bottle feed sya pag daytime with formula milk. breastfeed naman sya s night time because Im a working Mom. Then my mother got worried kasi tamad na daw dumede sa bote c baby. minsan nakaka 3 bottles or 20-24 oz lng sya mag hapon or for 8 hours. kindly suggest or advise thank you?