It is natural for your older child top feel jealous, but you can help him/her by making sure he/she knows you do not love him/her any less.
Try making him/her take part in helping with newborn's care to the extent he/she can do it e.G fetching diaper
bag or help pick out clothers for the baby after bathing. Make sure you do not encourage feeding
any solids but holding a baby bottle is ok.